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Escape HTML special characters

Written byPhuoc Nguyen

Created

29 May, 2020

Last updated

13 Oct, 2021

Category

String

JavaScript version

escape.js

const escape = (str) =>
    str
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/'/g, '&#39;')
        .replace(/"/g, '&quot;');

// Or
const escape = (str) =>
    str.replace(/[&<>"']/g, (m) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[m]));

TypeScript version

escape.ts

const escape = (str: string): string =>
    str
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/'/g, '&#39;')
        .replace(/"/g, '&quot;');

// Or
const escape = (str: string): string =>
    str.replace(/[&<>"']/g, (m) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[m]));

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Escape HTML special characters

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