Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

perf(escapeHTML): use multiple replace #178

Draft
wants to merge 1 commit into
base: master
Choose a base branch
from
Draft

perf(escapeHTML): use multiple replace #178

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 15 additions & 3 deletions lib/escape_html.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@

const unescapeHTML = require('./unescape_html');

const htmlEntityMap = {
/* const htmlEntityMap = {
'&': '&',
'<': '&lt;',
'>': '&gt;',
Expand All @@ -11,15 +11,27 @@ const htmlEntityMap = {
'`': '&#96;',
'/': '&#x2F;',
'=': '&#x3D;'
};
}; */

function escapeHTML(str) {
if (typeof str !== 'string') throw new TypeError('str must be a string!');

str = unescapeHTML(str);

// http://stackoverflow.com/a/12034334
return str.replace(/[&<>"'`/=]/g, a => htmlEntityMap[a]);
// return str.replace(/[&<>"'`/=]/g, a => htmlEntityMap[a]);

// Multiple replacement is faster than map replacement on Node.js 12 or later.
// Benchmark: https://runkit.com/sukkaw/5e3003ffe7e84c0013f6210d
return str
.replace(/&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&#39;')
.replace(/`/g, '&#96;')
.replace(/\//g, '&#x2F;')
.replace(/=/g, '&#x3D;');
}

module.exports = escapeHTML;
23 changes: 9 additions & 14 deletions lib/unescape_html.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,22 +1,17 @@
'use strict';

const htmlEntityMap = {
'&amp;': '&',
'&lt;': '<',
'&gt;': '>',
'&quot;': '"',
'&#39;': '\'',
'&#96;': '`',
'&#x2F;': '/',
'&#x3D;': '='
};

const regexHtml = new RegExp(Object.keys(htmlEntityMap).join('|'), 'g');

const unescapeHTML = str => {
if (typeof str !== 'string') throw new TypeError('str must be a string!');

return str.replace(regexHtml, a => htmlEntityMap[a]);
return str
.replace(/&amp;/g, '&')
.replace(/&lt;/g, '<')
.replace(/&gt;/g, '>')
.replace(/&quot;/g, '"')
.replace(/&#39;/g, '\'')
.replace(/&#96;/g, '`')
.replace(/&#x2F;/g, '/')
.replace(/&#x3D;/g, '=');
};

module.exports = unescapeHTML;