将meta_box添加到WordPress。取消表单提交

我向WordPress添加了一个新的meta_box。
我有一个按钮, 按下该按钮会将字符串复制到计算机的内存中。
问题在于代码可能是形式形式的, 因为我看到以下内容：

< form id = 'adv-settings' method = 'post'>

发生的事情是, 当你单击按钮时, 它将发送表单并刷新页面。我想取消此选项, 它将不会发送。
这是我添加到主题内的functions.php文件中的代码：

add_action( 'add_meta_boxes', 'add_meta_boxes' ); function add_meta_boxes() { add_meta_box( 'woocommerce-order-my-custom', __( 'COPY' ), 'order_my_custom', 'shop_order', 'side', 'default' ); } function order_my_custom() { ?> < /form> < button onclick="copyToClipboard()"> Copy to clipboard< /button> < button onclick="copyToClipboard('I want to get copied into my clipboard')"> Copy to clipboard< /button> < script> function copyToClipboard() { let textToCopy= "I want to get copied into my clipboard", urlInput = document.createElement( "input" ); document.body.appendChild( urlInput ); urlInput.setAttribute( "value", textToCopy ); if ( navigator.userAgent.match( /ipad|ipod|iphone/i ) ) { let contentEditable= urlInput.contentEditable, readOnly= urlInput.readOnly, range= document.createRange(), windowSelection= window.getSelection(); urlInput.contentEditable = !0; urlInput.readOnly= !1; range.selectNodeContents( urlInput ); windowSelection.removeAllRanges(); windowSelection.addRange( range ); urlInput.setSelectionRange( 0, 999999 ); urlInput.contentEditable = contentEditable; urlInput.readOnly= readOnly } else urlInput.select(); document.execCommand( "copy" ); document.body.removeChild( urlInput ); alert( "Successfully copied to clipboard" ); } < /script> < ?php }

谁能帮我？谢谢
#1【将meta_box添加到WordPress。取消表单提交】试试这个代码。添加type =’ button’ 属性。

function order_my_custom(){ ?> < /form> < button type="button" onclick="copyToClipboard()"> Copy to clipboard< /button> < button type="button"onclick="copyToClipboard('I want to get copied into my clipboard')"> Copy to clipboard< /button> < script> function copyToClipboard() { let textToCopy= "I want to get copied into my clipboard", urlInput = document.createElement( "input" ); document.body.appendChild( urlInput ); urlInput.setAttribute( "value", textToCopy ); if ( navigator.userAgent.match( /ipad|ipod|iphone/i ) ) { let contentEditable= urlInput.contentEditable, readOnly= urlInput.readOnly, range= document.createRange(), windowSelection= window.getSelection(); urlInput.contentEditable = !0; urlInput.readOnly= !1; range.selectNodeContents( urlInput ); windowSelection.removeAllRanges(); windowSelection.addRange( range ); urlInput.setSelectionRange( 0, 999999 ); urlInput.contentEditable = contentEditable; urlInput.readOnly= readOnly } else urlInput.select(); document.execCommand( "copy" ); document.body.removeChild( urlInput ); alert( "Successfully copied to clipboard" ); } < /script> < ?php }