i 想在二次后一度显示数字,但低于编码,显示总数。
function showVal(){
for(i=0; i<5; i++)
{
var showingVal= document.write("the number is "+i);
document.write("<br />");
}
}
setInterval( showVal() ,1000);
i 想在二次后一度显示数字,但低于编码,显示总数。
function showVal(){
for(i=0; i<5; i++)
{
var showingVal= document.write("the number is "+i);
document.write("<br />");
}
}
setInterval( showVal() ,1000);
更能使用<条码>准时<>。
function showVal(n) {
if(!n)
n = 0;
var showingVal = document.write("the number is " + n);
document.write("<br />");
if(n < 4) {
setTimeout(function() { showVal(n + 1); }, 1000);
}
}
setTimeout(showVal, 1000);
页: 1
这比<条码>版Interval好,因为在你印刷了5个数字之后,你打上了记号。 效率。 + 无全球变量:-
或者,你可以读取“密码>。
不要在功能内使用 lo,而是使用一种全球变量,在功能内加以使用,如果该数目达到极限,则进行检查。
您可在间隔期内使用<代码>文件>write,因为这在文件完成后将写到文件上,然后由案文取代文件。
此外,该职能中的守则有时只产出一个编号,它一度产出所有数字。 你们需要超越职能范围,以便随时了解职能在哪里。
使用<代码>clear Interval,一旦其输出所有数字,即停止使用。
在该网页上已经存在的要素中添加案文。 将该守则放在该页的后面,以便在该法典开始时建立该要素。
<div id="SomeElement"></div>
<script type="text/javascript">
var handle, counter = 0, text = ;
function showVal(){
if (counter < 5) {
text += "the number is " + counter + "<br />";
document.getElementById("SomeElement").innerHTML = text;
counter++;
} else {
window.clearInterval(handle);
}
}
handle = window.setInterval(showVal, 1000);
</script>
Demo: http://jsfiddle.net/Guffa/CY5DV/。
(可以在关闭时这样做,以便它能够以变数污染全球范围,但对于该问题的主要问题来说,这并不重要)。)
function printCount() {
for (let i = 1; i <= 5; i++) {
setTimeout(function() {
document.write(i + "<br>");
}, i * 1000);
}
}
printCount();
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