The JavaScript exception "Invalid array length" occurs when specifying an array length that is either negative, a floating number or exceeds the maximum supported by the platform (i.e. when creating ...

The push() method appends values to an array. { {jsxref ("Array.prototype.unshift ()")}} has similar behavior to push(), but applied to the start of an array. The push() method is a mutating method.

Learn how JavaScript’s built-in functions like map() and filter(), as well as compose() and chain(), support a more elegant handling of JavaScript arrays.