package.2022.IsStringPrefix.js Maven / Gradle / Ivy

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ECMAScript spec abstract operations.

There is a newer version: 1.22.3

'use strict';

var GetIntrinsic = require('get-intrinsic');

var $TypeError = GetIntrinsic('%TypeError%');

var StringIndexOf = require('./StringIndexOf');
var Type = require('./Type');

// https://262.ecma-international.org/13.0/#sec-isstringprefix

module.exports = function IsStringPrefix(p, q) {
	if (Type(p) !== 'String') {
		throw new $TypeError('Assertion failed: "p" must be a String');
	}

	if (Type(q) !== 'String') {
		throw new $TypeError('Assertion failed: "q" must be a String');
	}

	return StringIndexOf(q, p, 0) === 0;
};