Set.prototype.add() - JavaScript 编辑

The add() method appends a new element with a specified value to the end of a Set object.

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The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

Syntax

mySet.add(value);

Parameters

value

The value of the element to add to the Set object.

Return value

The Set object with added value.

Examples

Using the add() method

var mySet = new Set();

mySet.add(1);
mySet.add(5).add('some text'); // chainable

console.log(mySet);
// Set [1, 5, "some text"]

Specifications

Specification
ECMAScript (ECMA-262) The definition of 'Set.prototype.add' in that specification.

Browser compatibility

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See also

• Set
• Set.prototype.delete()
• Set.prototype.has()