vue 模拟随机变速的动态打字特效【支持多行文本】（含css实现闪烁光标，js动态改变setInterval定时器的时间间隔）

<template>
    <div class="contentBox">
        <span>{{showContent}}</span>
        <span v-if="showBlinkCursor" class="blinkCursor">|</span>
    </div>
</template>
<script>
    export default {
        mounted() {
            let that = this
            let index = 0;
            var myFunction = function () {
                clearInterval(timer);
                if (index < that.allContent.length) {
                    that.interval = Math.random() * 500
                    that.showContent += that.allContent[index]
                    index++;
                    timer = setInterval(myFunction, that.interval);
                } else {
                    that.showBlinkCursor = false
                }
            }
            var timer = setInterval(myFunction, that.interval);
        },
        data() {
            return {
                interval: 100,
                showBlinkCursor: true,
                showContent: '',
                allContent:
                    "多想一醒来 晨风就能抚平忧伤\n" +
                    "多想一转身 目光就融化掉冰霜\n" +
                    "多想一抬头 看见你微笑的脸庞\n" +
                    "多想你能够 把喜怒哀乐对我讲\n" +
                    "多想一家人 心朝着同一个方向\n" +
                    "多想一路上 包容着温暖的体谅\n" +
                    "多想一放下 世界就还给你梦想\n" +
                    "多想你知道 爱就在我心底流淌\n" +
                    "生活总该迎着光亮\n" +
                    "再跌跌撞撞也要坚强\n" +
                    "数着流星降落你肩膀\n" +
                    "而我一直陪伴在你身旁\n" +
                    "生活总该迎着光亮\n" +
                    "失望过后拥抱更多希望\n" +
                    "夜的尽头叫做阳光\n" +
                    "手中的幸福 终将会绽放"
            }
        }
    };
</script>
<style scoped>
    .contentBox {
        white-space: pre-wrap;
    }

    .blinkCursor {
        animation: Blink 1s ease-in 0s infinite;
    }

    @keyframes Blink {
        0% {
            opacity: 0;
        }
        100% {
            opacity: 1;
        }
    }
</style>

<span class="blinkCursor">|</span>
 

    .blinkCursor {
        animation: Blink 1s ease-in 0s infinite;
    }

    @keyframes Blink {
        0% {
            opacity: 0;
        }
        100% {
            opacity: 1;
        }
    }

var interval = 500
var myFunction = function () {
    // 必须先清除掉定时器，再重新创建定时器，才能改变时间间隔
    clearInterval(timer);
    interval = Math.random() * 500
    timer = setInterval(myFunction, interval);
}
var timer = setInterval(myFunction, interval);