Yii2下拉活动表单上的错误调用函数

Question

Halo, I using Yii2 and I get error while call a function in dropdown list.

This is my dropdown :

<?= $form->field($model, "jenis_manifest")->dropDownList([ 'Berangkat' => 'Berangkat', 'Pulang' => 'Pulang'], ['onchange' => 'fungsiUtama();', 'class' => 'form-control', 'prompt' => '-- Manifest --']) ?>

And this is my script :

<?php

    $script = <<<JS
    function fungsiUtama()
    {
        alert("Hello");
    }
    JS;

    $this->registerJs($script);
?>

I also try with JsExpression base on this question , but still not working.

This is the error what I get :

Answer 1

Use

$this->registerJs($script, \yii\web\View::POS_END);

The last part means - add this script straightforward at the end of page.

Without the second function argument the default one is called - \\yii\\web\\View::POS_READY - which means - add this script wrapped in jQuery(document).ready() method that forces scripts to wait untill the page's DOM is fully loaded. Before that your script is unavailable and that is probably why you've got this error.