Tag

#JavaScript

SnippetMar 8, 2013

JavaScript - Global error handler

Catch every unhandled JavaScript error on a page with window.onerror and show the message, URL and line number.

window.onerror = function(error, url, line) {
    var errorDetails = "Error Description = " + error;
    errorDetails += "\nUrl = " + url;
    errorDetails += "\nLine Number = " + line;

    alert(errorDetails);

1 min read#JavaScript

SnippetFeb 7, 2013
JavaScript: invoke a function by name from a string variable
Look the function up on window using its name, check it is a function, then call it with apply.
```
var functiontocall = "HelloWorld";
var fn = window[functiontocall];
if (typeof fn !== 'function')
    return;
var retvalue = fn.apply(window, ["Amal Hashim"]);
```
1 min read#JavaScript#jQuery
ArticleDec 23, 2012
JavaScript: detect if a SharePoint page is in edit mode
Several client side ways to tell whether a SharePoint publishing, web part or wiki page is in edit mode.
2 min read#JavaScript#SharePoint
SnippetNov 20, 2012
JavaScript error handling
Handle exceptions in JavaScript with try, catch and finally, and catch everything else with window.onerror.
```
try {
    // Code block
}
catch (e) {
    // Handle exception
}
```
1 min read#JavaScript
SnippetOct 19, 2012
jQuery HTML encode and decode
Two small functions that encode and decode HTML characters by letting jQuery and the browser do the work.
1 min read#JavaScript#jQuery
SnippetJun 1, 2012
JavaScript Popup Close Event Handling
Run code when a popup window opened with window.open is closed, using the onbeforeunload event.
```
var popupWindow = window.open(url);

popupWindow.onbeforeunload = function() {
   //Do processing

   return null;
```
1 min read#JavaScript#jQuery

SnippetMay 15, 2012

Javascript Encrypt Decrypt

A simple XOR based encrypt and decrypt routine in JavaScript, for demonstration only.

function Encrypt()
{
    var actual = "stringtoencrypt";
    var key = 100; //Any integer value
    var result = "";
    for (var i = 0; i < actual.length; i++)

1 min read#JavaScript#jQuery

ArticleMay 6, 2012
Tiny MCE - Rich Text Editor
Convert a textarea into a rich text editor with TinyMCE, a JavaScript HTML WYSIWYG editor.
2 min read#JavaScript#Tools
SnippetMar 30, 2012
jQuery KeyDown Event
A generic JavaScript function to capture a key press and run logic, such as clearing a field on backspace.
```
function CheckKey(e) {
    var keynum;
    if (window.event) // IE
    {
        keynum = e.keyCode;
    }
```
1 min read#ASP.NET#JavaScript#jQuery
ArticleMar 25, 2012
jQuery AutoComplete Control
Steps to add a jQuery UI autocomplete (type ahead) box to an ASP.NET page, backed by a WCF data service.
2 min read#ASP.NET#JavaScript#jQuery
SnippetMar 23, 2012
SharePoint 2010 Modal Dialog
Open a page in a SharePoint 2010 modal dialog from JavaScript and handle the result when it closes.
```
var options = SP.UI.$create_DialogOptions();
options.width = 450;
options.height = 450;
options.url = "/_layouts/PageName.aspx";
options.showClose = true;
options.title = "Dialog Title";
```
1 min read#JavaScript#SharePoint#SharePoint 2010
ArticleMar 21, 2012
jQuery Ajax Loading Image
Show a centred loading image while Ajax calls run, then reveal the page when they finish.
1 min read#JavaScript#jQuery

#JavaScript

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