const regex = /(?:\{\{(?:[^{}"]|"[^"]*"|'[^']*')*?(?<!['"'])\bthis\b(?!['"'])(?:[^{}"]|"[^"]*"|'[^']*')*?\}\})|(?:<(?:[^<>"']|"[^"]*"|'[^']*')*?(?<!['"'])\bthis\b(?!['"'])(?:[^<>"']|"[^"]*"|'[^']*')*?\/?>)|(?:<this\.[\w-]+(?:\s[^>]*)?\/?>)|(?:<[^<>\s]+(?:\s[^<>]*?)?\|\s*this\s*\|[^<>]*>)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?:\\{\\{(?:[^{}"]|"[^"]*"|\'[^\']*\')*?(?<![\'"\'])\\bthis\\b(?![\'"\'])(?:[^{}"]|"[^"]*"|\'[^\']*\')*?\\}\\})|(?:<(?:[^<>"\']|"[^"]*"|\'[^\']*\')*?(?<![\'"\'])\\bthis\\b(?![\'"\'])(?:[^<>"\']|"[^"]*"|\'[^\']*\')*?\\\/?>)|(?:<this\\.[\\w-]+(?:\\s[^>]*)?\\\/?>)|(?:<[^<>\\s]+(?:\\s[^<>]*?)?\\|\\s*this\\s*\\|[^<>]*>)', 'gm')
const str = `{{this}}
{{ this.thing}}
{{
this
}}
{{concat "}}" this }}
{{concat "}}" "this" }}
{{"this"}}
{{'this'}}
{{(this)}}
// fine
<Foo @foo=this />
<div {{this}}></div>
<Foo @foo={{this}} />
<s x={{if (foo hi=(two this))}}></s>
<this.hello />
<Foo as |this|>
{{this}}
</Foo>`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions