Perf: optimized html escape helper

10 years ago · c45c345c6b
1 changed files with 8 additions and 4 deletions
--- a/lib/common/utils.js
+++ b/lib/common/utils.js
@ -30,11 +30,15 @@ function assign(obj /*from1, from2, from3, ...*/) {
 }


+var ESCAPE_TEST_RE = /[<>"]/;
+
 function escapeHtml(str) {
+  if (ESCAPE_TEST_RE.test(str)) {
    if (str.indexOf('&') >= 0) { str = str.replace(/&/g, '&amp;'); }
    if (str.indexOf('<') >= 0) { str = str.replace(/</g, '&lt;'); }
    if (str.indexOf('>') >= 0) { str = str.replace(/>/g, '&gt;'); }
    if (str.indexOf('"') >= 0) { str = str.replace(/"/g, '&quot;'); }
+  }
  return str;
 }