Array.prototype.shift() - JavaScript | MDN

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Calling shift() on non-array objects

The shift() method reads the length property of this. If the normalized length is 0, length is set to 0 again (whereas it may be negative or undefined before). Otherwise, the property at 0 is returned, and the rest of th

Calling shift() on non-array objects

The shift() method reads the length property of this. If the normalized length is 0, length is set to 0 again (whereas it may be negative or undefined before). Otherwise, the property at 0 is returned, and the rest of th

Indexed collections

Array.prototype.push()

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Array.prototype.splice()

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This page was last modified on Jul 20, 2025 by MDN contributors.

[Symbol.iterator]()

[Symbol.unscopables]

[Symbol.hasInstance]()

__defineGetter__()

__defineSetter__()

__lookupGetter__()

__lookupSetter__()