Introduction to the Every () method in JavaScript

Each method in the JavaScript array tests whether all the elements in the array are provided by the supplied function to implement the test.

Grammar

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1	Array.every (callback[, Thisobject]);

The following are the details of the parameters:

Callback: Functions are used to test each element

Thisobject: Object is used as the execution callback

return value:

Returns true if each element in this array satisfies the provided test function.

Compatibility:

This approach 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 to the top of the code:

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

Example:

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This will produce the following results:

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1	The Value:falsesecond test value:true