Detailed description of the every () method in JavaScript, javascriptevery

Detailed description of the every () method in JavaScript, javascriptevery

Each method in the JavaScript array tests whether all elements in the array have passed the provided functions.
Syntax

array.every(callback[, thisObject]);

The following is the detailed information about the parameters:

• Callback: The function is used to test each element.
• ThisObject: the object used for executing the callback

Return Value:

Returns true if each element in the array meets the provided test function.
Compatibility:

This method is a JavaScript extension to the ECMA-262 standard; so it may not exist in other implementations of the standard. To make it work, you need to add the following script code at the top:

if (!Array.prototype.every){ Array.prototype.every = function(fun /*, thisp*/) {  var len = this.length;  if (typeof fun != "function")   throw new TypeError();  var thisp = arguments[1];  for (var i = 0; i < len; i++)  {   if (i in this &&     !fun.call(thisp, this[i], i, this))    return false;  }  return true; };}

Example:

This produces the following results:
First Test Value : falseSecond Test Value : true