Error: Unable to execute decodeHtml because it is not recognized as a function

After transitioning to VueJS 2, I encountered a challenge.

While using a filter that calls a custom function, I received the error message:

TypeError: this.decodeHtml is not a function

Below is my code snippet:

 new Vue({
         el: '#modal',
         data: {...}
         computed: {...}
         methods: {
                decodeHtml: function decodeHtml(html) {
                        var txt = document.createElement("textarea");
                        txt.innerHTML = html;
                        return txt.value;
                    },
         ... },
        filters: {
                    html: function html(_html) {
                        return this.decodeHtml(_html);
                    }
                }

In my HTML, it's called like this: @{{ categoryFullName | html }}

Any insight on why this issue occurred after migration? It was functioning properly before.

Check out the code on this fiddle link

Answer №1

Your scope is causing an issue. When using the html function, the this variable is being interpreted as a Window object instead of a Vue object.

To work around this problem, you can integrate the functionality of the decodeHtml function into your filter. Here's how:

filters: {
  html: (html) => {
    var temporaryElement = document.createElement("textarea");
    temporaryElement.innerHTML = html;
    return temporaryElement.value;
  }
}

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