jquery - 防止循环

Question

抱歉，这对你们所有人来说可能都不简单，但在尝试了几件事之后，我离我想要的还很远。

我只是想在第一次运行后停止这个动画: CSS typewriter

var TxtType = function(el, toRotate, period) {
        this.toRotate = toRotate;
        this.el = el;
        this.loopNum = 0;
        this.period = parseInt(period, 10) || 2000;
        this.txt = '';
        this.tick();
        this.isDeleting = false;
    };

    TxtType.prototype.tick = function() {
        var i = this.loopNum % this.toRotate.length;
        var fullTxt = this.toRotate[i];

        if (this.isDeleting) {
        this.txt = fullTxt.substring(0, this.txt.length - 1);
        } else {
        this.txt = fullTxt.substring(0, this.txt.length + 1);
        }

        this.el.innerHTML = '<span class="wrap">'+this.txt+'</span>';

        var that = this;
        var delta = 200 - Math.random() * 100;

        if (this.isDeleting) { delta /= 2; }

        if (!this.isDeleting && this.txt === fullTxt) {
        delta = this.period;
        this.isDeleting = true;
        } else if (this.isDeleting && this.txt === '') {
        this.isDeleting = false;
        this.loopNum++;
        delta = 500;
        }

        setTimeout(function() {
        that.tick();
        }, delta);
    };

    window.onload = function() {
        var elements = document.getElementsByClassName('typewrite');
        for (var i=0; i<elements.length; i++) {
            var toRotate = elements[i].getAttribute('data-type');
            var period = elements[i].getAttribute('data-period');
            if (toRotate) {
              new TxtType(elements[i], JSON.parse(toRotate), period);
            }
        }
        // INJECT CSS
        var css = document.createElement("style");
        css.type = "text/css";
        css.innerHTML = ".typewrite > .wrap { border-right: 0.08em solid #fff}";
        document.body.appendChild(css);
    };

感谢您的帮助!

Answer 1

你好(goedemorgen)vloryan，

如果你想在所有的句子/单词都被动画化之后停止动画，那么只需更改

if (typeof dataText[i] == 'undefined'){
    setTimeout(function() {
      StartTextAnimation(0);
    }, 500);
 }

到

if (typeof dataText[i] == 'undefined'){
    return false;
 }

这样做的目的是，如果计数器到达单词/句子数组的末尾(因为 i 未定义)，它将返回 false 并停止。

注意:此代码来自您的 Fiddle。