如何在JavaScript中对多个查找/替换对使用str.replace

var str = "Hello world. This is a test.";
var replacements = [
  { find: /Hello/g, replace: "Hi" },
  { find: /world/g, replace: "universe" },
  { find: /test/g, replace: "example" }
];

for (var i = 0; i < replacements.length; i++) {
  str = str.replace(replacements[i].find, replacements[i].replace);
}

console.log(str);

var str = "Hello world. This is a test.";
var replacements = [
  { find: "Hello", replace: "Hi" },
  { find: "world", replace: "universe" },
  { find: "test", replace: "example" }
];

str = str.replace(/Hello|world|test/g, function(match) {
  for (var i = 0; i < replacements.length; i++) {
    if (match === replacements[i].find) {
      return replacements[i].replace;
    }
  }
});

console.log(str);