Issue #3309Opened March 4, 2021by jcamejo0 reactions

BUG: TextNodes interfere when changing content on element

Question

Version: 0.16.44

Hi @artf

I have a custom block with a custom button component, which its content is similar to this one. <a data-gjs-type="custom_button" class="btn btn-1" href="">Click here</a>

Additionally, I've added a text trait to change the button content, in this particular case I do not want to use the editor RTE. <img width="286" alt="image" src="https://user-images.githubusercontent.com/1976679/109966677-d3a91180-7cf0-11eb-8463-e28b8de806c2.png">

When i change the value, the first time it gets reflected correctly <img width="975" alt="image" src="https://user-images.githubusercontent.com/1976679/109967201-6c3f9180-7cf1-11eb-943e-0c96e8693845.png">

But when i save and reload the page again, it gets back to its original value <img width="967" alt="image" src="https://user-images.githubusercontent.com/1976679/109967439-b6287780-7cf1-11eb-8c81-053458c1dc38.png">

This is happening in the updateContent function of the component view, the component is checking if it has children, in that case, the component does not render the content, the element has children, but they are text nodes.

Also if you set the content beforehand as a component configuration attribute, it does this.

<img width="972" alt="image" src="https://user-images.githubusercontent.com/1976679/109968113-9180cf80-7cf2-11eb-9d5a-961d0fe78237.png">

The toHtml function of the Component model first prints the content and then its children (the text nodes).

In my case i have solved this by overriding the renderChildren and toHtml functions in view and model of my custom component, also removing the default text of the tag directly and adding it to the component configuration only. I'm writing this because maybe the case goes beyond my particular situation and can cause other problems.

For what I've seen the text nodes are a little tricky to handle. When i have some time i can go back to this again and provide a

Answers (3)

artfMarch 10, 20210 reactions

Hi Juan, thanks for the report, are you able to show me how your text trait works? I'd expect it to work correctly if you update your component in this way component.components(e.target.value)

jcamejoMarch 11, 20210 reactions

This was my trait

tm.addType('content', {
   events: {
     'change': 'onValueChange'
   },
   getInputEl: function() {
     this.inputEl = document.createElement('input');
     this.inputEl.value = this.getModelValue();
     return this.inputEl;
   },
   getModelValue: function() {
     const { model, target } = this;
     var value = target.get('content') || target.getEl().textContent;
     return value;
   },
   onValueChange: function() {
     const { model, target } = this;
     var value = this.inputEl.value;
     target.set('content', value);
     target.getEl().textContent = value;
   },
   onUpdate: function() {
     var value = this.getModelValue();
     this.target.getEl().textContent = value;
   }
 });

I have changed it to

tm.addType('content', {
   events: {
     'change': 'onValueChange'
   },
   getInputEl: function() {
     this.inputEl = document.createElement('input');
     this.inputEl.value = this.getModelValue();
     return this.inputEl;
   },
   getModelValue: function() {
     const { model, target } = this;
     var value = target.get('content') || target.getEl().textContent;
     return value;
   },
   onValueChange: function() {
     const { model, target } = this;
     var value = this.inputEl.value;
     target.set('content', value);
     target.components(value);
   },
   onUpdate: function() {
     var value = this.getModelValue();
     this.target.getEl().textContent = value;
   }
 });

And now it works without overriding update content or render children, thanks! I would have never arrived to the conclusion of using the components method. Now i don't like text nodes 😅

I think we can close this issue unless there's some other point you want to add to improve.

Thanks!

artfMarch 21, 20210 reactions

I don't think you need this one target.set('content', value);. For the rest all good 👍

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