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let CSVExportService = require('json2csvexporter').default; | |
const exporter = CSVExportService.create(); | |
function download(htmlTable) { | |
exporter.downloadCSV(tableToJson(htmlTable)); | |
} | |
// Credits: http://johndyer.name/html-table-to-json/ | |
function tableToJson(table) { | |
let data = []; // first row needs to be headers | |
var headers = []; | |
for (var i=0; i<table.rows[0].cells.length; i++) { | |
headers[i] = table.rows[0].cells[i].innerHTML.toLowerCase().replace(/ /gi,''); | |
} | |
// go through cells | |
for (var i=1; i<table.rows.length; i++) { | |
var tableRow = table.rows[i]; var rowData = {}; | |
for (var j=0; j<tableRow.cells.length; j++) { | |
rowData[ headers[j] ] = tableRow.cells[j].innerHTML; | |
} | |
data.push(rowData); | |
} | |
return data; | |
} | |
const table = document.querySelector('#data-table'); | |
const button = document.querySelector('#dl-btn'); | |
button.addEventListener('click', () => download(document.querySelector('#data-table'))); | |
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setTimeout(function(){ | |
;require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){ | |
'use strict'; | |
Object.defineProperty(exports, "__esModule", { | |
value: true | |
}); | |
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); | |
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } | |
/** | |
* Provides an interface for maping JS datatypes to a delimiter-seperated value. | |
* Creates a list of lists called rows and maps it to a Blob via toBlob(). | |
*/ | |
var WriterService = function () { | |
/** | |
* Default constructors. Takes two optional params. | |
* @param {String} delimiter - Delimitercharacter(s) to be used in the CSV. | |
* @param {String} contentType - Type of file. | |
*/ | |
function WriterService() { | |
var delimiter = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : ','; | |
var contentType = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'text/csv'; | |
_classCallCheck(this, WriterService); | |
this.delimiter = delimiter; | |
this.contentType = contentType; | |
this.rows = [[]]; | |
} | |
/** | |
* Returns the current row | |
* @return {Array} - An array of values. | |
*/ | |
_createClass(WriterService, [{ | |
key: 'wrapWithQuotes', | |
/** | |
* Returns the input string | |
* @param {String} string - The input string. | |
* @return {String} - A safe strings wrapped in quotes. | |
*/ | |
value: function wrapWithQuotes(string) { | |
var safeString = string.replace(/"/g, '""'); | |
return '"' + safeString + '"'; | |
} | |
/** | |
* Pushes a new value into the current row. | |
* @param {Any} value - The value to push. | |
*/ | |
}, { | |
key: 'writeValue', | |
value: function writeValue(value) { | |
var stringValue = value === undefined ? '' : String(value); | |
var needsQuotes = stringValue.indexOf(this.delimiter) !== -1 || /"\r\n/.test(stringValue); | |
this.currentRow.push(needsQuotes ? this.wrapWithQuotes(stringValue) : stringValue); | |
} | |
/** | |
* Adds a en empty array to rows property. This maps to an empty line. | |
*/ | |
}, { | |
key: 'writeLine', | |
value: function writeLine() { | |
this.rows.push([]); | |
} | |
/** | |
* Flatten rows to a String. | |
* @return {String} - A string representation of the rows.. | |
*/ | |
}, { | |
key: 'toString', | |
value: function toString() { | |
var _this = this; | |
return this.rows.map(function (row) { | |
return row.join(_this.delimiter); | |
}).reduce(function (content, row) { | |
return content + '\r\n' + row; | |
}); | |
} | |
/** | |
* Transform the rows into a Blob. | |
* @return {Object} - A representation of the rows in the form of a Blob. The returned Object is an instance of Blob, but typeof Object. | |
*/ | |
}, { | |
key: 'toBlob', | |
value: function toBlob() { | |
return new Blob([this.toString()], { type: this.contentType }); | |
} | |
}, { | |
key: 'currentRow', | |
get: function get() { | |
return this.rows[this.rows.length - 1]; | |
} | |
}]); | |
return WriterService; | |
}(); | |
exports.default = WriterService; | |
},{}],"json2csvexporter":[function(require,module,exports){ | |
'use strict'; | |
Object.defineProperty(exports, "__esModule", { | |
value: true | |
}); | |
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); | |
var _WriterService = require('./WriterService'); | |
var _WriterService2 = _interopRequireDefault(_WriterService); | |
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } | |
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } | |
/** | |
* Provides an ExportService that uses WriterService to mentain an in-memory representation of the CSV file. | |
* Uses downloadCSV to map the [data] via the Writer to a Blob and initiate download which triggers the download of the actual file in the browser. | |
* Provides static methods for Singleton-like usage. | |
*/ | |
var CSVExportService = function () { | |
/** | |
* Default constructor. Takes an optional options param. | |
* @param {Object} options - Provides the configuration options. | |
*/ | |
function CSVExportService(options) { | |
_classCallCheck(this, CSVExportService); | |
this.options = options || {}; | |
} | |
/** | |
* Shorthand for createCSV() with a pre-set writerType | |
*/ | |
_createClass(CSVExportService, [{ | |
key: 'createCSVBlob', | |
value: function createCSVBlob(data) { | |
return this.createCSV(data); | |
} | |
/** | |
* Shorthand for createCSV() with a pre-set writerType | |
*/ | |
}, { | |
key: 'dataToString', | |
value: function dataToString(data) { | |
return this.createCSV(data, 'string'); | |
} | |
/** | |
* Creates a Blob based on the provided data and configuration options. | |
* @param {Array} data - An array of JSON objects that will be mapped to the Blob. | |
* @param {String} writerType - ENUM for choosing the return type. Default to 'blo' | |
* @return {Object|String} - The Blob object (Is an instance of Blob, but typeof Object) or a String version of the CSV with newlines. | |
*/ | |
}, { | |
key: 'createCSV', | |
value: function createCSV(data) { | |
var writerType = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'blob'; | |
var _ref = this.options || {}, | |
optionsColumns = _ref.columns, | |
optionsContentType = _ref.contentType, | |
optionsDelimeter = _ref.delimeter, | |
optionsDelimiter = _ref.delimiter, | |
optionsFormatters = _ref.formatters, | |
optionsHeaders = _ref.headers, | |
optionsIncludeHeaders = _ref.includeHeaders; | |
var contentType = optionsContentType || 'text/csv'; | |
var delimiter = optionsDelimeter || ','; | |
var formatters = optionsFormatters || {}; | |
var getFormater = function getFormater(header) { | |
return formatters[header] || function (v) { | |
return v; | |
}; | |
}; | |
var headerNames = optionsHeaders || {}; | |
var headers = optionsColumns || Object.getOwnPropertyNames(data[0]); | |
var includeHeaders = optionsIncludeHeaders; | |
var writer = new _WriterService2.default(delimiter, contentType); | |
if (includeHeaders === undefined || includeHeaders) { | |
headers.forEach(function (header) { | |
return writer.writeValue(headerNames[header] || header); | |
}); | |
writer.writeLine(); | |
} | |
data.forEach(function (row) { | |
headers.forEach(function (header) { | |
return writer.writeValue(getFormater(header)(row[header])); | |
}); | |
writer.writeLine(); | |
}); | |
return writerType === 'string' ? writer.toString() : writer.toBlob(); | |
} | |
/** | |
* Triggers the download of the file. | |
* @param {Object} blob - The blob to be downloaded. | |
* @param {String} filename - Name of the file. | |
*/ | |
}, { | |
key: 'download', | |
value: function download(blob, filename) { | |
if (navigator.msSaveBlob) { | |
navigator.msSaveBlob(blob, filename); | |
return; | |
} | |
var link = document.createElement('A'); | |
var url = URL.createObjectURL(blob); | |
link.href = url; | |
link.download = filename; | |
link.style.display = 'none'; | |
document.body.appendChild(link); | |
link.click(); | |
document.body.removeChild(link); | |
} | |
/** | |
* Creates and passes the blob and filename params to the download() method. In case of error, calls the onError callback (if provided) and prints a error mesage if devMode is enabled via options. | |
* @param {Array} data - An array of objects to map and store. | |
*/ | |
}, { | |
key: 'downloadCSV', | |
value: function downloadCSV(data) { | |
try { | |
var blob = this.createCSV(data, 'blob'); | |
var filename = this.options.filename || 'export-' + (new Date().getTime() / 1000 | 0) + '.csv'; | |
this.download(blob, filename); | |
} catch (err) { | |
if (this.options.devMode) { | |
console.error('Error downloading CSV. Send this log to the developers: \n', err); | |
} | |
if (this.options.onError) { | |
this.options.onError(err); | |
} | |
} | |
} | |
}, { | |
key: 'toString', | |
value: function toString(data) { | |
var writer = new _WriterService2.default(delimiter, contentType); | |
} | |
/** | |
* Shorthand for constructor. | |
* @param {Object} options | |
* @return {Object} - An instance of CSVExportService | |
*/ | |
}], [{ | |
key: 'create', | |
value: function create(options) { | |
return new CSVExportService(options); | |
} | |
/** | |
* Shorthand for initialization and download() call. | |
* @param {Array} data - An array of objects to map and store. | |
* @return {undefined} | |
*/ | |
}, { | |
key: 'download', | |
value: function download(data) { | |
var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {}; | |
return new CSVExportService(options).downloadCSV(data); | |
} | |
}]); | |
return CSVExportService; | |
}(); | |
exports.default = CSVExportService; | |
},{"./WriterService":1}]},{},[]) | |
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Takes two optional params.\n   * @param  {String} delimiter - Delimitercharacter(s) to be used in the CSV.\n   * @param  {String} contentType - Type of file.\n   */\n  function WriterService() {\n    var delimiter = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : ',';\n    var contentType = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'text/csv';\n\n    _classCallCheck(this, WriterService);\n\n    this.delimiter = delimiter;\n    this.contentType = contentType;\n    this.rows = [[]];\n  }\n  /**\n   * Returns the current row\n   * @return {Array} - An array of values.\n   */\n\n\n  _createClass(WriterService, [{\n    key: 'wrapWithQuotes',\n\n    /**\n     * Returns the input string\n     * @param  {String} string - The input string.\n     * @return {String} - A safe strings wrapped in quotes.\n     */\n    value: function wrapWithQuotes(string) {\n      var safeString = string.replace(/\"/g, '\"\"');\n      return '\"' + safeString + '\"';\n    }\n    /**\n     * Pushes a new value into the current row.\n     * @param  {Any} value - The value to push.\n     */\n\n  }, {\n    key: 'writeValue',\n    value: function writeValue(value) {\n      var stringValue = value === undefined ? '' : String(value);\n      var needsQuotes = stringValue.indexOf(this.delimiter) !== -1 || /\"\\r\\n/.test(stringValue);\n      this.currentRow.push(needsQuotes ? this.wrapWithQuotes(stringValue) : stringValue);\n    }\n    /**\n     * Adds a en empty array to rows property. This maps to an empty line.\n     */\n\n  }, {\n    key: 'writeLine',\n    value: function writeLine() {\n      this.rows.push([]);\n    }\n    /**\n     * Flatten rows to a String.\n     * @return {String} - A string representation of the rows..\n     */\n\n  }, {\n    key: 'toString',\n    value: function toString() {\n      var _this = this;\n\n      return this.rows.map(function (row) {\n        return row.join(_this.delimiter);\n      }).reduce(function (content, row) {\n        return content + '\\r\\n' + row;\n      });\n    }\n    /**\n     * Transform the rows into a Blob.\n     * @return {Object} - A representation of the rows in the form of a Blob. The returned Object is an instance of Blob, but typeof Object.\n     */\n\n  }, {\n    key: 'toBlob',\n    value: function toBlob() {\n      return new Blob([this.toString()], { type: this.contentType });\n    }\n  }, {\n    key: 'currentRow',\n    get: function get() {\n      return this.rows[this.rows.length - 1];\n    }\n  }]);\n\n  return WriterService;\n}();\n\nexports.default = WriterService;","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nvar _WriterService = require('./WriterService');\n\nvar _WriterService2 = _interopRequireDefault(_WriterService);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n/**\n * Provides an ExportService that uses WriterService to mentain an in-memory representation of the CSV file.\n * Uses downloadCSV to map the [data] via the Writer to a Blob and initiate download which triggers the download of the actual file in the browser.\n * Provides static methods for Singleton-like usage.\n */\nvar CSVExportService = function () {\n  /**\n   * Default constructor. Takes an optional options param.\n   * @param  {Object} options - Provides the configuration options.\n   */\n  function CSVExportService(options) {\n    _classCallCheck(this, CSVExportService);\n\n    this.options = options || {};\n  }\n\n  /**\n   * Shorthand for createCSV() with a pre-set writerType\n  */\n\n\n  _createClass(CSVExportService, [{\n    key: 'createCSVBlob',\n    value: function createCSVBlob(data) {\n      return this.createCSV(data);\n    }\n\n    /**\n      * Shorthand for createCSV() with a pre-set writerType\n    */\n\n  }, {\n    key: 'dataToString',\n    value: function dataToString(data) {\n      return this.createCSV(data, 'string');\n    }\n\n    /**\n     * Creates a Blob based on the provided data and configuration options.\n     * @param  {Array} data - An array of JSON objects that will be mapped to the Blob.\n     * @param  {String} writerType - ENUM for choosing the return type. Default to 'blo'\n     * @return {Object|String} - The Blob object (Is an instance of Blob, but typeof Object) or a String version of the CSV with newlines.\n     */\n\n  }, {\n    key: 'createCSV',\n    value: function createCSV(data) {\n      var writerType = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'blob';\n\n      var _ref = this.options || {},\n          optionsColumns = _ref.columns,\n          optionsContentType = _ref.contentType,\n          optionsDelimeter = _ref.delimeter,\n          optionsDelimiter = _ref.delimiter,\n          optionsFormatters = _ref.formatters,\n          optionsHeaders = _ref.headers,\n          optionsIncludeHeaders = _ref.includeHeaders;\n\n      var contentType = optionsContentType || 'text/csv';\n      var delimiter = optionsDelimeter || ',';\n      var formatters = optionsFormatters || {};\n      var getFormater = function getFormater(header) {\n        return formatters[header] || function (v) {\n          return v;\n        };\n      };\n      var headerNames = optionsHeaders || {};\n      var headers = optionsColumns || Object.getOwnPropertyNames(data[0]);\n      var includeHeaders = optionsIncludeHeaders;\n      var writer = new _WriterService2.default(delimiter, contentType);\n\n      if (includeHeaders === undefined || includeHeaders) {\n        headers.forEach(function (header) {\n          return writer.writeValue(headerNames[header] || header);\n        });\n        writer.writeLine();\n      }\n      data.forEach(function (row) {\n        headers.forEach(function (header) {\n          return writer.writeValue(getFormater(header)(row[header]));\n        });\n        writer.writeLine();\n      });\n      return writerType === 'string' ? writer.toString() : writer.toBlob();\n    }\n    /**\n     * Triggers the download of the file.\n     * @param  {Object} blob - The blob to be downloaded.\n     * @param  {String} filename - Name of the file.\n     */\n\n  }, {\n    key: 'download',\n    value: function download(blob, filename) {\n      if (navigator.msSaveBlob) {\n        navigator.msSaveBlob(blob, filename);\n        return;\n      }\n      var link = document.createElement('A');\n      var url = URL.createObjectURL(blob);\n      link.href = url;\n      link.download = filename;\n      link.style.display = 'none';\n      document.body.appendChild(link);\n      link.click();\n      document.body.removeChild(link);\n    }\n    /**\n     * Creates and passes the blob and filename params to the download() method. In case of error, calls the onError callback (if provided) and prints a error mesage if devMode is enabled via options.\n     * @param  {Array} data - An array of objects to map and store.\n     */\n\n  }, {\n    key: 'downloadCSV',\n    value: function downloadCSV(data) {\n      try {\n        var blob = this.createCSV(data, 'blob');\n        var filename = this.options.filename || 'export-' + (new Date().getTime() / 1000 | 0) + '.csv';\n        this.download(blob, filename);\n      } catch (err) {\n        if (this.options.devMode) {\n          console.error('Error downloading CSV. Send this log to the developers: \\n', err);\n        }\n        if (this.options.onError) {\n          this.options.onError(err);\n        }\n      }\n    }\n  }, {\n    key: 'toString',\n    value: function toString(data) {\n      var writer = new _WriterService2.default(delimiter, contentType);\n    }\n\n    /**\n     * Shorthand for constructor.\n     * @param  {Object} options\n     * @return {Object} - An instance of CSVExportService\n     */\n\n  }], [{\n    key: 'create',\n    value: function create(options) {\n      return new CSVExportService(options);\n    }\n    /**\n     * Shorthand for initialization and download() call.\n     * @param  {Array} data - An array of objects to map and store.\n     * @return {undefined}\n     */\n\n  }, {\n    key: 'download',\n    value: function download(data) {\n      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n      return new CSVExportService(options).downloadCSV(data);\n    }\n  }]);\n\n  return CSVExportService;\n}();\n\nexports.default = CSVExportService;"]} | |
let CSVExportService = require('json2csvexporter').default; | |
const exporter = CSVExportService.create(); | |
function download(htmlTable) { | |
exporter.downloadCSV(tableToJson(htmlTable)); | |
} | |
// Credits: http://johndyer.name/html-table-to-json/ | |
function tableToJson(table) { | |
let data = []; // first row needs to be headers | |
var headers = []; | |
for (var i=0; i<table.rows[0].cells.length; i++) { | |
headers[i] = table.rows[0].cells[i].innerHTML.toLowerCase().replace(/ /gi,''); | |
} | |
// go through cells | |
for (var i=1; i<table.rows.length; i++) { | |
var tableRow = table.rows[i]; var rowData = {}; | |
for (var j=0; j<tableRow.cells.length; j++) { | |
rowData[ headers[j] ] = tableRow.cells[j].innerHTML; | |
} | |
data.push(rowData); | |
} | |
return data; | |
} | |
const table = document.querySelector('#data-table'); | |
const button = document.querySelector('#dl-btn'); | |
button.addEventListener('click', () => download(document.querySelector('#data-table'))); | |
;}, 0) |
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{ | |
"name": "json2csvexporter-demo", | |
"version": "1.0.0", | |
"dependencies": { | |
"json2csvexporter": "0.2.4" | |
} | |
} |
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<!-- contents of this file will be placed inside the <body> --> | |
<table id="data-table" class="table"> | |
<tr> | |
<th>Make</th> | |
<th>Model</th> | |
<th>Year</th> | |
</tr> | |
<tr> | |
<td>Toyota</td> | |
<td>Corolla</td> | |
<td>2014</td> | |
</tr> | |
<tr> | |
<td>Ford</td> | |
<td>Mustang</td> | |
<td>1970</td> | |
</tr> | |
<tr> | |
<td>Honda</td> | |
<td>Civic</td> | |
<td>2007</td> | |
</tr> | |
</table> | |
<button type="button" class="btn btn-default" id='dl-btn'>Download CSV</button> |
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<!-- contents of this file will be placed inside the <head> --> | |
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous"> |
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