本文介绍了Javascript - 检查是否在5秒内按下了两次键的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想检查在5秒内是否按了两次Enter键并执行一些操作。
如何在给定时间内检查密钥是否被按下一次或两次并执行不同的操作。
I want to check if Enter key was pressed twice within 5 secs and perform some action.How can I check if the key was pressed once or twice within a given time and perform different actions.
这是我的代码:
<h1 id="log">0</h1>
<br/>
<span id="enteredTime">0</span>
<script>
$(document).keypress(function(e) {
if(e.which == 13){
var element = $("#log");
var timeDifference = 0;
//Log the timestamp after pressing Enter
$("#enteredTime").text(new Date().getTime());
//Check if enter was pressed earlier
if ($("#enteredTime").text() !== "0") {
var now = new Date().getTime();
var previous = $("#enteredTime").text();
difference = now - previous;
}
//Check if enter was pressed only once within 5 secs or more
if(){
$("#log").text("Once");
$("#enteredTime").text("0");
//Check if enter was pressed twice in 5 secs
}else{
$("#log").text("Twice in less than 5 secs");
$("#enteredTime").text("0");
}
}
});
</script>
谢谢!
推荐答案
类似
var start=0;
$(document).keyup(function(e) {
if(e.keyCode == 13) {
elapsed = new Date().getTime();
if(elapsed-start<=5000){
//do something;
}
else{
//do something else;
}
start=elapsed;
}
});
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