如何使用yii2下拉列表隐藏块

Question

I have dropDownList in Yii2 project

<?= $form->field($model, 'license', ['options' =>['onchange'=>'getSalutationValue()'] )->dropDownList(['y' => 'Yes', 'n' => 'No']) ?>

i want hide some block if user seleckted value 'n' I tried this function

function getSalutationValue() {
        var label = this.value;
        if(label == 'n' ) {
        document.getElementById('driver').style.display='none';
            }}

What am i doing wrong? Please help me

Answer 1

You are not passing object of input field, so that you can use its value, try this

 <?= $form->field($model, 'license', ['options' =>['onchange'=>'getSalutationValue(this)'] )->dropDownList(['y' => 'Yes', 'n' => 'No']) ?>

in script

 function getSalutationValue(obj) {
    var label = obj.value;
    if(label == 'n' ) {
    document.getElementById('driver').style.display='none';
        }}

Updated:

 <?= $form->field($model, 'license')->dropDownList(['y' => 'Yes', 'n' => 'No'],['onchange'=>'getSalutationValue(this)']) ?>