async function inputText(input, text) {
  // 手动触发 input 和 change 事件
  for (let event of ['click', 'focus', 'text', 'input', 'change', 'blur']){
  if (event === 'text'){
    input.value = text;
  }else{
        input.dispatchEvent(new Event(event, { bubbles: true }));

  }
  await sleep(600)
  }
}

方式1

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

async function simulateTextInput(inputBox, text) {
    let range = document.createRange();
    range.selectNodeContents(inputBox);
    let sel = window.getSelection();
    sel.removeAllRanges();
    sel.addRange(range);

    await sleep(500)

    let inputEvent = new InputEvent('input', {
        bubbles: true,
        cancelable: true,
        inputType: 'insertText',
        data: text
    });

    inputBox.textContent = text;
    inputBox.dispatchEvent(inputEvent);
}

box = document.querySelector('#main .copyable-area [contenteditable="true"][role="textbox"]')
simulateTextInput(box, "😇")

方式2

let text = document.querySelector('div textarea')
    let pasteEvent = new ClipboardEvent('paste', {
        dataType: 'text/plain',
        data: imgs.join('\n')
    });

    let event = new Event('input', {
        bubbles: true,
        cancelable: true,
    });

// 模拟设置粘贴的内容
    text.value = 'something';

// 触发粘贴事件
    text.dispatchEvent(event);

方式3

const e = new InputEvent("input", {
                bubbles: true,
                cancelable: true
            });
            ele.dispatchEvent(e);
            const ee = new KeyboardEvent("keydown", {
                altKey: false,
                bubbles: true,
                cancelable: true,
                key: 'Enter',
                code: 'Enter',
                keyCode: 13,
                repeat: false
            });
            ele.dispatchEvent(ee);

终极

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

async function fillData(input, value) {
    let events = ['click', 'focus', 'setVal', 'input', 'change', 'blur'];
    for (let event of events) {
        if (event === 'setVal') {
            if (input.tagName.toLowerCase() === 'input') {
                input.setAttribute('value', value)
            } else {
                //text
                input.textContent = value
            }
        } else {
            console.log(`fill value query: ${input} value: ${value} event: ${event}`,);
            let eventObj = new Event(event, {
                bubbles: true,
                cancelable: true,
            })
            input.dispatchEvent(eventObj);
            await sleep(400)
        }
    }
}