JavaScript Symbol.matchAll Property

Below is the example of the Symbol.matchAll property.

Example:

JavaScript

<script>

// JavaScript to illustrate Symbol.matchAll property
function func() {

    // Regular expression
    const regExp = /[0-9]+/g;

    // Date
    const date = "06-03-2021";

    // finalResult store result of matchAll property
    const result = regExp[Symbol.matchAll](date);

    // Iterate on all matched elements
    console.log(Array.from(result, (x) => x[0]));
}

func();
</script>

• Output:

["06", "03", "2021"]

The Symbol.matchAll property returns the regular expression that matches against a string. The String.prototype.matchAll() method calls this function. The syntax of the property is as follows:

regExp[Symbol.matchAll](str);

Arguments: It takes a string used to find matches of the regular expression against the string.

Return value: The Symbol.matchAll property returns an iterator that returns regular expression matches against the string.

Examples for the above function are provided below:

Example 1:

const result = /a/[Symbol.matchAll]("abcd");

In this example, the Symbol.matchAll property returns an iterator that returns regular expression /a/ matches against the string “abcd” which is stored in the result. Therefore, the matched element is [“a”].

Output:

["a"]

Example 2:

const result = /[0-9]+/g[Symbol.matchAll]("06-03-2021");

In this example, the matched element to the regular expression is 06, 03 and 2021. The regular expression [0-9] shows that the matched element must contain 0 to 9. And g means global that do the global search.

Output:

["06","03","2021"]

Example 3:

const result = /[0-9]+/g[Symbol.matchAll]
    ("India got freedom in 1947");

In this example, the matched element to the regular expression is 1947. Because the only matched element is 1947.

Output:

["1947"]

Complete code for the above function are provided below:

Program 1:

JavaScript

<script>
    function func() {

        // Final Result store result of matchAll property
        const result = /a/[Symbol.matchAll]("abcd");

        // Iterate on all matched elements
        console.log(Array.from(result, (x) => x[0]));
    }

    func();
</script>

Output:

["a"]

Program 2:

JavaScript

<script>
    function func() {

        // finalResult store result of matchAll property
        const result = /[0-9]+/g[Symbol.matchAll]("06-03-2021");

        // Iterate on all matched elements
        console.log(Array.from(result, (x) => x[0]));
    }

    func();
</script>

Output:

["06","03","2021"]

Program 3:

JavaScript

<script>
    function func() {

        // finalResult store result of
        // matchAll property
        const result = /[0-9]+/g[Symbol.matchAll]
            ("India got freedom in 1947");

        // Iterate on all matched elements
        console.log(Array.from(result, (x) => x[0]));
    }

    func();
</script>

Output:

["1947"]