How to implement asynchronous loading of SelectMenu option list in wangEditor v4 version?

Detailed explanation of wangEditor v4 asynchronous loading SelectMenu options

This article introduces how to implement asynchronous loading of the SelectMenu option in wangEditor v4, that is, obtain option data from the backend interface dynamically update the drop-down menu.

Assuming that your SelectMenu needs to populate the option list based on the data returned by the backend interface, you can follow the following steps:

1. Initialize options attribute: In the constructor of SelectMenu, initialize an empty options array. This will be used to store option data obtained from the backend.

    constructor(editor) {
       super(editor);
       this.options = [];
   }

2. Implement the getOptions method: This method is used to return the option list of SelectMenu. It should return the options array initialized in step 1.

    getOptions() {
       return this.options;
   }

3. Asynchronously get and update options: Use asynchronous functions (such as fetch or axios ) to get option data from the backend interface. After getting the data, update this.options and trigger an editor update to reflect the changes.

    async fetchOptions() {
       try {
           const response = await fetch('/api/options'); // Replace with your interface address const data = await response.json();
           this.options = data.options; // Assume that the interface returns data format { options: [...] }
           this.editor.txt.html(this.editor.txt.html()); // Refresh the editor} catch (error) {
           console.error('Failed to get option:', error);
       }
   }

4. Calling an asynchronous function: Call the fetchOptions function to load option data at the appropriate time (for example, after SelectMenu is initialized or after the user triggers an event). This may require modifying the source code of wangEditor or calling it in the appropriate lifecycle hook using a custom method.

Through the above steps, your wangEditor v4 SelectMenu can dynamically load options. Remember to replace /api/options to your actual backend interface address and adjust the code according to the data structure returned by your interface. If this.editor.txt.html(this.editor.txt.html()) cannot refresh the UI, you can consider using other update methods or events provided by wangEditor to ensure that the UI is updated.

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