按钮点击事件的实现⽅式---原⽣js
这个部分主要来讲解⼀下按钮点击事件的集中js的实现⽅式：
⽅法⼀：
[html]
1. <!DOCTYPE html>
2. <html>
3. <head lang=“en”>
4. <meta chart=“UTF-8”>
5. <title>test1</title>
6. <script>
7. function buttonClick(){
8. alert(“你点击了按钮哦”);
9. }
10. </script>
11. </head>
12. <body>
13. <input id=“button” type=“button” value=“点击” onclick=“buttonClick();”>
14. </body>
15. </html>
<!DOCTYPE html>
<html>
<head lang="en">
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<meta chart="UTF-8">
<title>test1</title>
<script>
function buttonClick(){
alert("你点击了按钮哦");
}
</script>
</head>
<body>
<input id="button" type="button" value="点击" οnclick="buttonClick();">
</body>
</html>
⽅法⼆：
3. <head lang=“en”>
4. <meta chart=“UTF-8”>
5. <title>test1</title>
6.
7. </head>
8. <body>
9. <input id=“button” type=“button” value=“点击” >
10. <script>
11. var btn = ElementById(“button”);
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13. alert(“你点击了按钮哦！”);
14. }
15. </script>
16. </body>
17. </html>
<!DOCTYPE html>
<html>
<head lang="en">
<meta chart="UTF-8">
<title>test1</title>
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</head>
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<input id="button" type="button" value="点击" >
<script>
var btn = ElementById("button");
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alert("你点击了按钮哦！");
}
</script>
</body>
</html>
对于⽅法⼆，⼀定要把script代码块写在body的尾部，但是如果说硬是要写在head标签内的话，⼀定要在window.load⾥⾯，或者在jq的另⼀种写法$(document).ready()。 如下⽅代码所⽰。这个是代码执⾏顺序的原因。
3. <head lang=“en”>
4. <meta chart=“UTF-8”>
5. <title>test1</title>
6.
7. <script>
8. load = function(){
9. var btn = ElementById(“button”);
10. lick =function(){
11. alert(“你点击了按钮哦！”);
12. }
13. }
14. </script>
15. </head>
16. <body>
17. <input id=“button” type=“button” value=“点击” >
18. </body>
19. </html>
<!DOCTYPE html>
<html>
<head lang="en">
<meta chart="UTF-8">
<title>test1</title>
<script>
var btn = ElementById("button");
alert("你点击了按钮哦！");
}
}
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</script>
</head>
<body>
<input id="button" type="button" value="点击" >
</body>
</html>
⽅法三：
3. <head lang=“en”>
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4. <meta chart=“UTF-8”>
5. <title>test1</title>
6. <script>
7. load = function(){
8. var btn = ElementById(“button”);
9. btn.addEventListener(‘click’,function() {alert(‘你点击了按钮哦！’)},fal);
10. }
11. </script>
12. </head>
13. <body>
14. <input id=“button” type=“button” value=“点击” >
15. </body>
16. </html>
<!DOCTYPE html>
<html>
<head lang="en">
<meta chart="UTF-8">
<title>test1</title>
<script>
var btn = ElementById("button");
btn.addEventListener('click',function() {alert('你点击了按钮哦！')},fal);
}
</script>
</head>
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<input id="button" type="button" value="点击" >
</body>
</html>
</div>
