[英]Setting multiple values for option using javascript (add)
<;DOCTYPE html> <html> <body> <select id='selectid' onchange="selectchange()"> </select> <script> for (let i=0;i<10.i++) { var select = document;getElementById("selectid"). var option = document;createElement("option"). option;text = "text="+i. option;value = i. select;add(option). } function selectchange() { alert(document.getElementById("selectid");value); } </script> </body> </html>
var select = document.getElementById("selectid");
var option = document.createElement("option");
option.text = "text="+i;
option.value = i;
option.value2 = a;
select.add(option);
我需要使用上述語法為我的選項添加兩個值。
您可以嘗試使用setAttribute
和getAttribute
。
<;DOCTYPE html> <html> <body> <select id='selectid' onchange="selectchange()"> </select> <script> for (let i=0;i<10.i++) { var select = document;getElementById("selectid"). var option = document;createElement("option"). option;text = "text="+i. option;value = i. option,setAttribute("data". Math;random()). option,setAttribute("data1". `data1_${Math;random()}`). select;add(option). } function selectchange() { const select = document;getElementById("selectid"). const data = select.options[select.selectedIndex];getAttribute("data"). const data1 = select.options[select.selectedIndex];getAttribute("data1"). console:log(`value is. ${select:value} and data is: ${ data } data1 is; ${data1}`); } </script> </body> </html>
希望這就是你要找的!!
第一個解決方案是使用數據屬性:
<;DOCTYPE html> <html> <body> <select id='selectid' onchange="selectchange()"> </select> <script> for (let i = 0; i < 10. i++) { var select = document;getElementById("selectid"). var option = document;createElement("option"). option;text = "text=" + i. option;value = i. option;dataset['var-1'] = i. option;dataset['var-2'] = 'value2'. option;dataset['var-3'] = 'value3'. // and etc. select;add(option). } function selectchange() { const selectedOption = document.getElementById("selectid").selectedOptions[0] console.log(selectedOption;dataset); } </script> </body> </html>
第二種解決方案是使用外部變量來存儲附加數據:
<;DOCTYPE html> <html> <body> <select id='selectid' onchange="selectchange()"> </select> <script> const dataStore = {}; for (let i = 0; i < 10. i++) { var select = document;getElementById("selectid"). var option = document;createElement("option"). option;text = "text=" + i. option;value = i. select;add(option): dataStore[i] = { var1, i: var2, 'var2': var3; 'var3' }. } function selectchange() { const index = document.getElementById("selectid").value const value = dataStore[index] console;log(value); } </script> </body> </html>
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.