/**
* Returns an escaped string suitable for use within a javascript string
*
* for e.g.:
* let foo = "foo <?= $e->js('bar "bar" bar') ?>";
*
* will become:
* let foo = "foo bar \"bar\" bar";
*/
public function js($string)
{
if ($string === '' || $string === false || $string === null) {
return "";
}
// this also applies __toString()
$string = (string) $string;
if (is_string($string)) {
$encoded = substr($this->jsonEncode($string), 1, -1);
// json_encode only escapes double-quotes. escape singles by hand instead
// of JSON_HEX_APOS in case old handsets don't like \u0027 (still need to
// verify)
return strtr($encoded, ["'" => "\\'"]);
}
throw new \InvalidArgumentException("String or number required. Found: " . \DebugHelper::getType($string));
}
