Javascript：文本区域的最后一个字符未大写

Question

Editing a Shopify app. Last character in the text area does not get capitalized on the label picture unless you click outside of text area.

 $(function() { $('#cstedit-addembossing').keyup(function() { this.value = this.value.toUpperCase(); }); }); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <textarea maxlength="10" data-area="back" class="customify-text" data-target="addembossing" id="cstedit-addembossing" placeholder="Write a name, special date, quote, and the list goes on"></textarea> 

Answer 1

You probably are looking for a different event than keyup . input works best for what you are trying to do imo.

$(function() {
    $('#cstedit-addembossing').on("input", function() {
        this.value = this.value.toUpperCase();
    });
});

Answer 2

 // those listeners are added by customizer-final-v33.js foo.addEventListener('change', e => display.textContent = foo.value); foo.addEventListener('input', e => display.textContent = foo.value); // this is basically your listener foo.addEventListener('keyup', e => foo.value = foo.value.toUpperCase()); 

 <textarea id="foo"></textarea> <hr /> <h1 id="display">Type and texarea will update this text.</h1> 

To fix that, here you go:

 // those listeners are added by customizer-final-v33.js foo.addEventListener('change', e => display.textContent = foo.value); foo.addEventListener('input', e => display.textContent = foo.value); // this is basically a working version your listener foo.addEventListener('keydown', (e) => { event.preventDefault(); foo.value = foo.value + String.fromCharCode(e.keyCode).toUpperCase(); foo.dispatchEvent(new CustomEvent('input', { bubbles: true })); }) 

 <textarea id="foo"></textarea> <hr /> <h1 id="display">Type and texarea will update this text.</h1>