code-boxx/0-JS-DOC-FRAG.MD

## 0-JS-DOC-FRAG.MD

      
    Raw
  

              0-JS-DOC-FRAG.MD
            
          
    JAVASCRIPT HTML DOCUMENT FRAGMENT

https://code-boxx.com/javascript-document-fragment/
LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-create-fragment.html
<!DOCTYPE html>
<html>
  <head>
    <title>Document Fragment Example</title>
  </head>
  <body>
    <!-- (A) LIST TO APPEND TO -->
    <ul id="thelist">
      <li>Apple - A juicy red fruit, sometimes green.</li>
    </ul>

    <!-- (B) JAVASCRIPT -->
    <script>
    // (B1) DATA TO ADD
    var data = {
      Banana : "Long yellow fruit. Priced at $120,000 with a duct tape.",
      Cherry : "Small red berry thing.",
      Dragonfruit : "Not a dragon but a fruit.",
      Elderberry : "Wise old berry, +5 intelligence."
    };

    // (B2) CREATE DOCUMENT FRAGMENT
    // CAN BE CREATED WITH NEW DOCUMENTFRAGMENT() OR DOCUMENT.CREATEDOCUMENTFRAGMENT()
    var frag = new DocumentFragment();
    // var frag = document.createDocumentFragment();

    // (B3) APPEND DATA TO FRAGMENT
    for (let [k,v] of Object.entries(data)) {
      let row = document.createElement("li");
      row.innerHTML = `${k} - ${v}`;
      frag.appendChild(row);
    }

    // (B4) APPEND FRAGMENT TO TABLE
    document.getElementById("thelist").appendChild(frag);
    </script>
  </body>
</html>

## 2a-direct-insert.html
<!DOCTYPE html>
<html>
  <head>
    <title>Direct Insertion</title>
  </head>
  <body>
    <!-- (A) TABLE TO APPEND TO -->
    <table id="thetable"></table>

    <!-- (B) JAVASCRIPT -->
    <script>
    // (B1) START TIMING
    var start = new Date();

    // (B2) GENERATE A LOT OF TABLE ROWS + CELLS
    var thetable = document.getElementById("thetable");
    for (let i=1; i<=1000; i++) {
      let row = document.createElement("tr"),
          cellA = document.createElement("td"),
          cellB = document.createElement("td"),
          cellC = document.createElement("td"),
          cellD = document.createElement("td");
      cellA.innerHTML = "Cell A" + i;
      cellB.innerHTML = "Cell B" + i;
      cellC.innerHTML = "Cell C" + i;
      cellD.innerHTML = "Cell D" + i;
      row.appendChild(cellA);
      row.appendChild(cellB);
      row.appendChild(cellC);
      row.appendChild(cellD);
      thetable.appendChild(row);
    }

    // (B3) ELAPSED TIME
    var time = new Date() - start;
    console.log("Elapsed: " + time);
    </script>
  </body>
</html>

## 2b-fragment-insert.html
<!DOCTYPE html>
<html>
  <head>
    <title>Fragment Insertion</title>
  </head>
  <body>
    <!-- (A) TABLE TO APPEND TO -->
    <table id="thetable"></table>

    <!-- (B) JAVASCRIPT -->
    <script>
    // (B1) START TIMING
    var start = new Date();

    // (B2) GENERATE A LOT OF TABLE ROWS + CELLS
    var frag = new DocumentFragment();
    for (let i=1; i<=1000; i++) {
      let row = document.createElement("tr"),
          cellA = document.createElement("td"),
          cellB = document.createElement("td"),
          cellC = document.createElement("td"),
          cellD = document.createElement("td");
      cellA.innerHTML = "Cell A" + i;
      cellB.innerHTML = "Cell B" + i;
      cellC.innerHTML = "Cell C" + i;
      cellD.innerHTML = "Cell D" + i;
      row.appendChild(cellA);
      row.appendChild(cellB);
      row.appendChild(cellC);
      row.appendChild(cellD);
      frag.appendChild(row);
    }
    document.getElementById("thetable").appendChild(frag);

    // (B3) ELAPSED TIME
    var time = new Date() - start;
    console.log("Elapsed: " + time);
    </script>
  </body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>Document Fragment Example</title>
	</head>
	<body>
	<!-- (A) LIST TO APPEND TO -->
	<ul id="thelist">
	<li>Apple - A juicy red fruit, sometimes green.</li>
	</ul>

	<!-- (B) JAVASCRIPT -->
	<script>
	// (B1) DATA TO ADD
	var data = {
	Banana : "Long yellow fruit. Priced at $120,000 with a duct tape.",
	Cherry : "Small red berry thing.",
	Dragonfruit : "Not a dragon but a fruit.",
	Elderberry : "Wise old berry, +5 intelligence."
	};

	// (B2) CREATE DOCUMENT FRAGMENT
	// CAN BE CREATED WITH NEW DOCUMENTFRAGMENT() OR DOCUMENT.CREATEDOCUMENTFRAGMENT()
	var frag = new DocumentFragment();
	// var frag = document.createDocumentFragment();

	// (B3) APPEND DATA TO FRAGMENT
	for (let [k,v] of Object.entries(data)) {
	let row = document.createElement("li");
	row.innerHTML = `${k} - ${v}`;
	frag.appendChild(row);
	}

	// (B4) APPEND FRAGMENT TO TABLE
	document.getElementById("thelist").appendChild(frag);
	</script>
	</body>
	</html>