所以,我试图使用数学在Javascript中创建一个随机文本生成器。地板和数学。随机的,我也使用Javascript将其与倒计时计时器结合起来。但是,倒计时值为<= 0后的结果不会出现我在函数中设置的随机文本。
实际上,它似乎没有定义。解决方案是什么?我创建的脚本如下:
<button id="btn" style="background-color:red;width:30px;height:30px;"></button>
<script>
var timer = 5;
var id;
function create_random_string(string_length){
var random_string = 'X-';
var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890'
for (var i, i=0; i < string_length; i++){
random_string += characters.charAt(Math.floor(Math.random() * characters.length))
}
}
function starButton() {
this.style.display = 'none';
id = setInterval(function () {
timer--;
if (timer <= 0) {
clearInterval(id);
document.getElementById("script").innerHTML = create_random_string(5);
} else {
document.getElementById("script").innerHTML = timer + " seconds to get Code";
} }, 1000);
};
var clickbtn = document.getElementById("btn");
clickbtn.onclick = starButton;
</script>
<div id="script"></div>
您的函数没有返回任何内容。如果你不返回函数值,它将如何得到它!现在检查一下。
var timer = 5;
var id;
function create_random_string(string_length){
debugger;
var random_string = 'X-';
var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890'
for (var i, i=0; i < string_length; i++){
random_string += characters.charAt(Math.floor(Math.random() * characters.length))
}
return random_string;
}
function starButton() {
this.style.display = 'none';
id = setInterval(function () {
timer--;
if (timer <= 0) {
clearInterval(id);
document.getElementById("script").innerHTML = create_random_string(5);
} else {
document.getElementById("script").innerHTML = timer + " seconds to get Code";
} }, 1000);
};
var clickbtn = document.getElementById("btn");
clickbtn.onclick = starButton;
<button id="btn" style="background-color:red;width:30px;height:30px;"></button>
<div id="script"></div>