JS怎么计算html标签里文字的宽度
方法： 做一个空的html 标签 id为“ruler”,样式为“position:absolute;visibility: hidden; white-space: nowrap;z-index: -100”;
目的为了不影响页面，只是用来放你要测的文字的宽度，得到目标文字的内容，大小和字体.放到如下方法就行了：
|
1
2
3
4
5
6
7
8
9
|
String.prototype.visualLength = function(size,family) { var ruler = $("#ruler").css({ "font-size":size || "inherit", "font-family":family || "inherit" }); ruler.text(this); return ruler.width(); } |
实例如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
<!DOCTYPE html><html><head></head><style> #ruler { position:absolute; visibility: hidden; white-space: nowrap; z-index: -100; }</style><body><span id="ruler">test</span><span >tasdfasdfasdfest</span><script src="./jquery.min.js"></script><script> String.prototype.visualLength = function(size,family) { var ruler = $("#ruler").css({ "font-size":size || "inherit", "font-family":family || "inherit" }); ruler.text(this); return ruler.width(); } var text = "tasdfasdfasdfest"; var len = text.visualLength("16px"); console.log(len)</script></body></html> |
转：https://www.cnblogs.com/flxy-1028/p/7813836.html
