如何将 msg.payload 存储到 ui_template 节点红色内的脚本变量中? [英] How to store a msg.payload into a script variable inside a ui_template node red?

问题描述

我写了这段代码，但它不起作用

I wrote this code but it doesn't work

   <script type = "text/javascript">

        var msg = {{msg.payload}}

   </script>

由于语法中的{"，此方法将 {{msg.payload}} 值视为错误，我尝试了不同的方法，但没有任何效果，我想我遗漏了一些我不明白的东西，请我愿意接受任何建议.

this method consider the {{msg.payload}} value as an error due to the '{' in the syntax, I tried different ways, but nothing works, I guess I'm missing something that I don't understand, please I m open to any suggestion.

推荐答案

仪表板 UI 节点使用 Angular模板，所以你需要做一些不同的事情.

The Dashboard UI node uses Angular for it's templating so you need do things a little differently.

可以在此处找到一个很好的例子，但基本上类似于这个:

A good example can be found here but basically something like this:

<script>
    //console.dir(scope) // this also works
    //console.dir(scope.msg) // This doesn't because scope.msg doesn't yet exist

    // Lambda function to access the Angular Scope
    ;(function(scope) {
        //console.log('--- SCOPE ---')
        //console.dir(scope) // this works but you only get it once (on startup)
        //console.dir(scope.msg) // Doesn't work for  because scope.msg doesn't yet exist

        //Have to use $watch so we pick up new, incoming msg's
        scope.$watch('msg.payload', function(newVal, oldVal) {
            console.log('- Scope.msg -')
            console.dir(scope.msg)
        })

    })(scope)
</script>

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