<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>test</title> </head> <body> <select name="" id="type"> <option value="U盘卡">U盘卡</option> <option value="WIFI卡">WIFI卡</option> <option value="网口卡">网口卡</option> </select> <button id="bt">按钮</button> <script> //长度值 width = 640; height = 16; type = ""; //最终打印出来的型号 //U盘系列 boolean变量 UN = width <= 320 && height<= 32 || width<=640 && height<=16; UM = width <= 512 && height<= 32 || width<=1024 && height<=16; document.getElementById("bt").onclick = function(){ //型号选择 var obj = document.getElementById("type"); var index = obj.selectedIndex; var tp = obj[index].text; //选择的型号 switch(tp){ case "U盘卡": f1(); break; case "WIFI卡": f2(); break; case "网口卡": f3(); break; } //选择到那个型号,就调用指定型号的方法 function f1(){ if (UN) { type = "ZH-UN"; } else if (UM) { type = "ZH-UM"; } alert(type); } //选择到那个型号,就调用指定型号的方法 function f2(){ if(UN){ type = "ZH-WN"; }else if(UM){ type = "ZH-WM"; } alert(type); } //选择到那个型号,就调用指定型号的方法 function f3(){ if(UN){ type = "ZH-E1"; }else if(UM){ type = "ZH-E2"; } alert(type); } } </script> </body> </html>
纯JS使用switch和if语句判断控制卡的型号
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转载自blog.csdn.net/byte_dance/article/details/79774073
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