Warn the user if leave the current page using javascript

     In some situation user have chance to wrongly press back, close or reload button in browser, if we want to show any waning message we can use the onbeforeunload event.

Example

    window.onbeforeunload = function() { 

        return "Are you sure to go back?"; 

    };



Example Program:- (Editor)


Editor is Loading...

Advertisement

Nhận xét

Đăng nhận xét

Bài đăng phổ biến từ blog này

How to set the SDK, NDK and JDK path to android studio?

Hình ảnh
If you want to set the SDK path  directly you can set it to in local.properties like below sdk.dir = D \:\\ Program Files \\ Android Studio \\ SDK If you want to set the NDK path  directly you can set it to in  local.properties  like below ndk.dir = C \:\\ android-ndk-r12b-windows-x86 \\ android-ndk-r12b We can set the path by selecting folder by using the below method. After open the android studio press C trl+Shift+Alt+S
Đọc thêm

physicsjs - Increase the restitution value for circle and retangle

Hình ảnh
In this example we are increase the edge-collision-detection restitution value.     Physics(function(world) {       // bounds of the window       var renderer = Physics.renderer(          'canvas', {             el: 'viewport', // id of the canvas element             width:500,             height:500          });       world.add(renderer);       var square = Physics.body(          'rectangle', {             x: 250,             y: 250,             vx: 0.10, ...
Đọc thêm

Select all values from list box in a single click using javascript

Hình ảnh
     The following example code will help you to select all or deselect all the items from list box using javascript code.     function listboxSelectDeselect(listID, isSelect) {       var listbox = document.getElementById(listID);       for (var count = 0; count < listbox.options.length; count++) {         listbox.options[count].selected = isSelect;       }     } Example Program:- (Editor) Editor is Loading... Output:- Advertisement
Đọc thêm