function generate() { var redBalls = []; while (redBalls.length < 6){ var num = Math.floor(Math.random() * 33) + 1; if (redBalls.indexOf(num) === -1) { redBalls.push(num); } } redBalls.sort(function(a,b){ return a - b; }); var blueBall = Math.floor(Math.random() * 16) + 1; var result = redBalls.map(num => (num < 10 ? '0' + num : num.toString())).join(" ") + " " + (blueBall < 10 ? '0' + blueBall : blueBall.toString()); displayResult(result); } function displayResult(result){ var container = document.getElementById("ball-container"); container.innerHTML = ""; for (var i = 0; i <6; i++) { var ball = document.createElement("div"); ball.classList.add("red-ball"); ball.innerHTML = result.split(" ")[i]; container.appendChild(ball); } var ball = document.createElement("div"); ball.classList.add("blue-ball"); ball.innerHTML = result.split(' ')[6]; container.appendChild(ball); } 更改代码为jQuery

以下是使用 jQuery 改写后的代码：

function generate() {
  var redBalls = [];
  while (redBalls.length < 6){
    var num = Math.floor(Math.random() * 33) + 1;
    if (redBalls.indexOf(num) === -1) {
      redBalls.push(num);
    }
  }
  redBalls.sort(function(a,b){
    return a - b;
  });
  var blueBall = Math.floor(Math.random() * 16) + 1;
  var result = redBalls.map(num => (num < 10 ? '0' + num : num.toString())).join(" ") + " " + (blueBall < 10 ? '0' + blueBall : blueBall.toString());
  displayResult(result);
}

function displayResult(result){
  var $container = $("#ball-container");
  $container.empty();
  for (var i = 0; i <6; i++) {
    var $ball = $("<div>").addClass("red-ball").text(result.split(" ")[i]);
    $container.append($ball);
  }
  var $ball = $("<div>").addClass("blue-ball").text(result.split(' ')[6]);
  $container.append($ball);
}

其中，`document.getElementById` 改为了 `$()`，`innerHTML` 改为了 `text()`，`document.createElement` 改为了 `$("<div>")`，`classList` 改为了 `addClass()`，`appendChild` 改为了 `append()`，`container.innerHTML = ""` 改为了 `$container.empty()`。