Skip to content

Instantly share code, notes, and snippets.

@qkdreyer
Last active Mar 1, 2018
Embed
What would you like to do?
Lodash/Underscore dataURI/base64/string/typedArray to objectURL mixin
_.mixin({
dataURIToObjectURL(dataURI) {
return this.blobToObjectURL(this.dataURIToBlob(dataURI));
},
base64ToObjectURL(base64, type) {
return this.blobToObjectURL(this.base64ToBlob(base64, type));
},
stringToObjectURL(string, type) {
return this.blobToObjectURL(this.stringToBlob(string, type));
},
typedArrayToObjectURL(typedArray, type) {
return this.blobToObjectURL(this.typedArrayToBlob(typedArray, type));
},
blobToObjectURL(blob) {
return window.URL.createObjectURL(blob);
},
dataURIToBlob(string) {
const [header, base64] = string.split(',');
return this.base64ToBlob(base64, header.replace('data:', '').replace(';base64', ''));
},
base64ToBlob(string, type) {
return this.stringToBlob(window.atob(string), type);
},
stringToBlob(string, type) {
return this.typedArrayToBlob(this.stringToTypedArray(string), type);
},
stringToTypedArray(string) {
const stringLength = string.length;
const arrayBuffer = new ArrayBuffer(stringLength);
const view = new Uint8Array(arrayBuffer);
for (let i = 0; i < stringLength; i += 1) {
view[i] = string.charCodeAt(i);
}
return view;
},
typedArrayToBlob(typedArray, type = 'image/jpeg') {
return new Blob([typedArray], { type });
},
stringToArrayBuffer(string) {
return this.stringToTypedArray(string).buffer;
},
arrayBufferToString(arrayBuffer) {
let string = '';
const view = new Uint8Array(arrayBuffer);
const viewLength = view.length;
for (let i = 0; i < viewLength; i += 1) {
string += String.fromCharCode(view[i]);
}
return string;
},
});
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment