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ArrayBuffer to base64 encoded string
...application/octet-binary'});
var reader = new FileReader();
reader.onload = function(evt){
var dataurl = evt.target.result;
callback(dataurl.substr(dataurl.indexOf(',')+1));
};
reader.readAsDataURL(blob);
}
//example:
var buf = new Uint8Array([11,22,33]);
arrayBuffer...
How to parse Excel (XLS) file in Javascript/HTML5
...rseExcel = function(file) {
var reader = new FileReader();
reader.onload = function(e) {
var data = e.target.result;
var workbook = XLSX.read(data, {
type: 'binary'
});
workbook.SheetNames.forEach(function(sheetName) {
// Here is your object
...
Pure JavaScript equivalent of jQuery's $.ready() - how to call a function when the page/DOM is ready
...ll to your code at the end of the body. This is faster to execute than an onload handler because this waits only for the DOM to be ready, not for all images to load. And, this works in every browser.
<!doctype html>
<html>
<head>
</head>
<body>
Your HTML here
<sc...
Parsing JSON from XmlHttpRequest.responseJSON
...LHttpRequest();
req.responseType = 'json';
req.open('GET', url, true);
req.onload = function() {
var jsonResponse = req.response;
// do something with jsonResponse
};
req.send(null);
Compatibility: responseType = 'json' is not supported by IE11.
The classic way
The standard XMLHttpRequest...
how to stop browser back button using javascript
...) {
global.location.hash = _hash;
}
};
global.onload = function () {
noBackPlease();
// disables backspace on page except on input fields and textarea..
document.body.onkeydown = function (e) {
var elm = e.target.nodeName....
How can I detect whether an iframe is loaded?
...rame>
jsfiddle DEMO.
Update: Using plain javascript
window.onload=function(){
var ifr=document.getElementById('MainPopupIframe');
ifr.onload=function(){
this.style.display='block';
console.log('laod the iframe')
};
var btn=document.getElementById...
How to check file MIME type with javascript before upload?
...iles[i]; // See step 1 above
var fileReader = new FileReader();
fileReader.onloadend = function(e) {
var arr = (new Uint8Array(e.target.result)).subarray(0, 4);
var header = "";
for(var i = 0; i < arr.length; i++) {
header += arr[i].toString(16);
}
console.log(header);
// Check ...
Get data from file input in JQuery
...r file = input.files[0];
var fr = new FileReader();
fr.onload = receivedText;
//fr.readAsText(file);
//fr.readAsBinaryString(file); //as bit work with base64 for example upload to server
fr.readAsDataURL(file);
}
}
function...
How can I mock dependencies for unit testing in RequireJS?
...18n = stubs.i18n;
stubs.i18n = {
load: sinon.spy(function(name, req, onLoad) {
onLoad(i18n);
})
};
_.each(stubs, function(value, key) {
var stubName = 'stub' + key + cnt;
map[key] = stubName;
define(stubName, function() {
return value;
});
});
return...
JS - get image width and height from the base64 code
...
var i = new Image();
i.onload = function(){
alert( i.width+", "+i.height );
};
i.src = imageData;
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