Sharing examples of specifying assignment of drop-down boxes using js, jQuery and easyui

This article mainly shares with you a js, jQuery and easyui implementation of the designated assignment method for the drop-down box. It has a good reference value and I hope it will be helpful to everyone. Let’s follow the editor to take a look, I hope it can help everyone.

js implementation:

1. Select the i-th option by letting it be selected. The code is as follows: (id is the drop-down box id)

(1) document.getElementById("id").options[i].selected=true;

(2) document.getElementById("messagetoid").selectedIndex = 1; (Select the first option)

2. This is achieved by determining the value of the option. The code is as follows:

document.getElementById("messagetoid").value=""; (select the option whose value is empty)

jQuery implementation:

1. By selecting the i-th option, similar to js implementation 1, the code is as follows:

$("#id").get(0) .selectedIndex =

1; (Select the first option)

2. By judging the value of the option, there are two methods. The code is as follows:

( 1) $("#id").val("123"); (Select the option with value "123")

(2) $("#messagetoid").attr("value" , ""); (Select the option whose value is empty)

EasyUI implementation:

$('#id').combobox('setValue','A'); (Select The value is the option of A,)

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