Title: philspectrum's Replies | WordPress.org

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# philspectrum

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## Forum Replies Created

Viewing 1 replies (of 1 total)

 *   Forum: [Developing with WordPress](https://wordpress.org/support/forum/wp-advanced/)
   
   In reply to: [Add Form Token Field on custom side metabox](https://wordpress.org/support/topic/add-form-token-field-on-custom-side-metabox/)
 *  Thread Starter [philspectrum](https://wordpress.org/support/users/philspectrum/)
 * (@philspectrum)
 * [6 years, 6 months ago](https://wordpress.org/support/topic/add-form-token-field-on-custom-side-metabox/#post-12074601)
 * I have advanced a little, but I still find some problems.
 * I’ve created the FormTokenField and now it renders. This is the Javascript code:
 *     ```
       function KeywordsComponent( props ) {
   
           var FormTokenField = wp.components.FormTokenField;
           var tokens = [wp.data.select('core/editor').getEditedPostAttribute('meta')._xbs_meta_keywords_field] ;
   
           return wp.element.createElement( FormTokenField , {
               label: props.label,
               value: tokens,
               onChange: function (content) {
                   tokens = content;
                   this.value = tokens;
                   wp.data.dispatch('core/editor').editPost({ meta: {_xbs_meta_keywords_field: tokens } })
                   console.log('El contenido ha cambiado a ', content);
               }
           });
       }
   
       wp.element.render(
           wp.element.createElement(KeywordsComponent, {label: 'Palabras clave'}),
           document.getElementById('xbs-keywords-component')
       );
       ```
   
 * But now, when I refresh the page the console output launch this message:
 * `TypeError: Cannot read property '_xbs_meta_keywords_field' of undefined`

Viewing 1 replies (of 1 total)