Fix/improve scriptlets

Related issue:
- uBlockOrigin/uBlock-issues#2678
- uBlockOrigin/uAssets#18278

assets/resources/scriptlets.js

@@ -1049,23 +1049,11 @@ function evaldataPrune(
 ) {
  self.eval = new Proxy(self.eval, {
  apply(target, thisArg, args) {
- let dataToEval = `${args[0]}`;
- const match = /^\s*\(\s*(\{.+\})\s*\)\s*$/s.exec(dataToEval);
- if ( match !== null ) {
- dataToEval = match[1];
+ let data = Reflect.apply(target, thisArg, args);
+ if ( typeof data === 'object' ) {
+ data = objectPrune(data, rawPrunePaths, rawNeedlePaths);
  }
- let data;
- try {
- data = JSON.parse(dataToEval);
- if ( typeof data === 'object' ) {
- let after = JSON.stringify(
- objectPrune(data, rawPrunePaths, rawNeedlePaths)
- );
- args[0] = `(${after})`;
- }
- } catch(ex) {
- }
- return Reflect.apply(target, thisArg, args);
+ return data;
  }
  });
 }
@@ -2332,7 +2320,7 @@ function hrefSanitizer(
  };
  const extractText = (elem, source) => {
  if ( /^\[.*\]$/.test(source) ) {
- return elem.getAttribute(source.slice(1,-1).trim()) || '';
+ source = elem.getAttribute(source.slice(1,-1).trim()) || '';
  }
  if ( source !== 'text' ) { return ''; }
  const text = elem.textContent