Easy and Fast JavaScript Solution (faster than 90%)
javascript\nvar minRemoveToMakeValid = function(s) {\n  let result = [...s];\n  let open = [];\n  \n  for (let i = 0; i < s.length; i++) {\n    if (s[i] === "("
```javascript\nvar minRemoveToMakeValid = function(s) {\n  let result = [...s];\n  let open = [];\n  \n  for (let i = 0; i < s.length; i++) {\n    if (s[i] === "(") open.push(i);\n    else if (s[i] === ")") {\n      if (open.length > 0) open.pop();\n      else result[i] = "";\n    }\n  }\n\n  while (open.length > 0) result[open.pop()] = "";\n  \n  return result.join("");\n};\n```
['JavaScript']