js 调用backspace

function simulateBackspace(element) {
    const event = new KeyboardEvent('keydown', {
        key: 'Backspace',
        bubbles: true,
        cancelable: true,
        keyCode: 8 // Backspace的keyCode
    });
    element.dispatchEvent(event);
}

// 使用示例
const inputElement = document.getElementById('myInput');
simulateBackspace(inputElement);

function deleteLastCharacter(inputElement) {
    const currentValue = inputElement.value;
    inputElement.value = currentValue.slice(0, -1);
}

// 使用示例
const inputElement = document.getElementById('myInput');
deleteLastCharacter(inputElement);

async function simulateBackspaceWithClipboard(element) {
    const selection = window.getSelection();
    if (selection.rangeCount > 0) {
        const range = selection.getRangeAt(0);
        const clonedRange = range.cloneRange();
        clonedRange.selectNodeContents(element);
        clonedRange.setEnd(range.endContainer, range.endOffset);
        const fragment = clonedRange.cloneContents();
        const tempDiv = document.createElement('div');
        tempDiv.appendChild(fragment);
        tempDiv.textContent = tempDiv.textContent.slice(0, -1);
        range.deleteContents();
        range.insertNode(tempDiv.firstChild);
    }
}

// 使用示例
const editableElement = document.getElementById('editable');
simulateBackspaceWithClipboard(editableElement);