兼容Android 和 ios JavaScript copy paste

<!DOCTYPE html>

<html>

	<head>

		<title>关于我们Frame</title>

		<meta charset="utf-8">

		<meta name="viewport" content="maximum-scale=1.0,minimum-scale=1.0,user-scalable=0,width=device-width,initial-scale=1.0"/>

		<meta name="format-detection" content="telephone=no,email=no,date=no,address=no">

		<meta name="copyright" content="www.acc5.com" />

		<style>

		</style>

		<script src="http://www.acc5.com/xueli/js/jquery-1.11.3.js"></script>

		<script src="http://app-static.acc5.com/app/copy2clipboard.js"></script>

	</head>

	<body>

		hello ,welcome!!!

		<input id="test" type='text' value='test text144' /><br>

		<button onclick="select_all_and_copy(document.getElementById('test'))">Copy to Clipboard</button>

	</body>

			<script>

			$().ready(function(){

					$('#test').val('test'+Math.random());

					try{

					  document.execCommand('copy');

					}catch(e){}

			})

			/*

			function iosCopyToClipboard(el) {

				var oldContentEditable = el.contentEditable,

					oldReadOnly = el.readOnly,

					range = document.createRange();

				el.contenteditable = true;

				el.readonly = false;

				range.selectNodeContents(el);

				var s = window.getSelection();

				s.removeAllRanges();

				s.addRange(range);

				el.setSelectionRange(0, 999999); // A big number, to cover anything that could be inside the element.

				el.contentEditable = oldContentEditable;

				el.readOnly = oldReadOnly;

				document.execCommand('copy');

			}

			iosCopyToClipboard(document.getElementById('test'))

			*/

		</script>

</html>

function tooltip(el, message)

{

	var scrollLeft = document.body.scrollLeft || document.documentElement.scrollLeft;

	var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;

	var x = parseInt(el.getBoundingClientRect().left) + scrollLeft + 10;

	var y = parseInt(el.getBoundingClientRect().top) + scrollTop + 10;

	if (!document.getElementById("copy_tooltip"))

	{

		var tooltip = document.createElement('div');

		tooltip.id = "copy_tooltip";

		tooltip.style.position = "absolute";

		tooltip.style.border = "1px solid black";

		tooltip.style.background = "#dbdb00";

		tooltip.style.opacity = 1;

		tooltip.style.transition = "opacity 0.3s";

		tooltip.style.zIndex = "1999999999"; // Version 1.2b

		document.body.appendChild(tooltip);

	}

	else

	{

		var tooltip = document.getElementById("copy_tooltip")

	}

	tooltip.style.opacity = 1;

	tooltip.style.display = "block"; // Version 1.2b

	tooltip.style.left = x + "px";

	tooltip.style.top = y + "px";

	tooltip.innerHTML = message;

	setTimeout(function() { tooltip.style.display = "none"; tooltip.style.opacity = 0; }, 2000);

}

function paste(el)

{

   	if (window.clipboardData) {

	   	// IE

    	el.value = window.clipboardData.getData('Text');

    	el.innerHTML = window.clipboardData.getData('Text');

    }

    else if (window.getSelection && document.createRange) {

        // non-IE

        if (el.tagName.match(/textarea|input/i) && el.value.length < 1)

        	el.value = " "; // iOS needs element not to be empty to select it and pop up 'paste' button

        else if (el.innerHTML.length < 1)

        	el.innerHTML = " "; // iOS needs element not to be empty to select it and pop up 'paste' button

        var editable = el.contentEditable; // Record contentEditable status of element

        var readOnly = el.readOnly; // Record readOnly status of element

       	el.contentEditable = true; // iOS will only select text on non-form elements if contentEditable = true;

       	el.readOnly = false; // iOS will not select in a read only form element

        var range = document.createRange();

        range.selectNodeContents(el);

        var sel = window.getSelection();

        sel.removeAllRanges();

        sel.addRange(range);

        if (el.nodeName == "TEXTAREA" || el.nodeName == "INPUT")

        	el.select(); // Firefox will only select a form element with select()

        if (el.setSelectionRange && navigator.userAgent.match(/ipad|ipod|iphone/i))

        	el.setSelectionRange(0, 999999); // iOS only selects "form" elements with SelectionRange

        if (document.queryCommandSupported("paste"))

       	{

			var successful = document.execCommand('Paste');

		    if (successful) tooltip(el, "Pasted.");

		    else

			{

				if (navigator.userAgent.match(/android/i) && navigator.userAgent.match(/chrome/i))

				{

					tooltip(el, "Click blue tab then click Paste");

						if (el.tagName.match(/textarea|input/i))

						{

			        		el.value = " "; el.focus();

			        		el.setSelectionRange(0, 0);

			        	}

			        	else

			        		el.innerHTML = "";

				}

				else

					tooltip(el, "Press CTRL-V to paste");

			}

		}

		else

		{

		    if (!navigator.userAgent.match(/ipad|ipod|iphone|android|silk/i))

				tooltip(el, "Press CTRL-V to paste");

		}

		el.contentEditable = editable; // Restore previous contentEditable status

        el.readOnly = readOnly; // Restore previous readOnly status

    }

}

function select_all_and_copy(el)

{

    // Copy textarea, pre, div, etc.

	if (document.body.createTextRange) {

        // IE

        var textRange = document.body.createTextRange();

        textRange.moveToElementText(el);

        textRange.select();

        textRange.execCommand("Copy");

		tooltip(el, "Copied!");

    }

	else if (window.getSelection && document.createRange) {

        // non-IE

        var editable = el.contentEditable; // Record contentEditable status of element

        var readOnly = el.readOnly; // Record readOnly status of element

       	el.contentEditable = true; // iOS will only select text on non-form elements if contentEditable = true;

       	el.readOnly = false; // iOS will not select in a read only form element

        var range = document.createRange();

        range.selectNodeContents(el);

        var sel = window.getSelection();

        sel.removeAllRanges();

        sel.addRange(range); // Does not work for Firefox if a textarea or input

        if (el.nodeName == "TEXTAREA" || el.nodeName == "INPUT")

        	el.select(); // Firefox will only select a form element with select()

        if (el.setSelectionRange && navigator.userAgent.match(/ipad|ipod|iphone/i))

        	el.setSelectionRange(0, 999999); // iOS only selects "form" elements with SelectionRange

        el.contentEditable = editable; // Restore previous contentEditable status

        el.readOnly = readOnly; // Restore previous readOnly status

	    if (document.queryCommandSupported("copy"))

	    {

			var successful = document.execCommand('copy');

		    if (successful) tooltip(el, "Copied to clipboard.");

		    else tooltip(el, "Press CTRL+C to copy");

		}

		else

		{

			if (!navigator.userAgent.match(/ipad|ipod|iphone|android|silk/i))

				tooltip(el, "Press CTRL+C to copy");

		}

    }

} // end function select_all_and_copy(el) 

function make_copy_button(el)

{

	//var copy_btn = document.createElement('button');

	//copy_btn.type = "button";

	var copy_btn = document.createElement('span');

	copy_btn.style.border = "1px solid black";

	copy_btn.style.padding = "5px";

	copy_btn.style.cursor = "pointer";

	copy_btn.style.display = "inline-block";

	copy_btn.style.background = "lightgrey";

	copy_btn.setAttribute("role", "button");

	copy_btn.setAttribute("tabindex", 0);

	el.parentNode.insertBefore(copy_btn, el.nextSibling);

	copy_btn.onclick = function() { select_all_and_copy(el); };

	//if (document.queryCommandSupported("copy") || parseInt(navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2]) >= 42)

	// Above caused: TypeError: 'null' is not an object (evaluating 'navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2]') in Safari

	if (document.queryCommandSupported("copy"))

	{

		// Desktop: Copy works with IE 4+, Chrome 42+, Firefox 41+, Opera 29+

		// Mobile: Copy works with Chrome for Android 42+, Firefox Mobile 41+

		//copy_btn.value = "Copy to Clipboard";

		copy_btn.innerHTML = "Copy to Clipboard";

	}

	else

	{

		// Select only for Safari and older Chrome, Firefox and Opera

		/* Mobile:

				Android Browser: Selects all and pops up "Copy" button

				iOS Safari: Selects all and pops up "Copy" button

				iOS Chrome: Form elements: Selects all and pops up "Copy" button

		*/

		//copy_btn.value = "Select All";

		copy_btn.innerHTML = "Select All";

	}

}

/* Note: document.queryCommandSupported("copy") should return "true" on browsers that support copy

	but there was a bug in Chrome versions 42 to 47 that makes it return "false".  So in those

	versions of Chrome feature detection does not work!

	See https://code.google.com/p/chromium/issues/detail?id=476508

*/

from：http://www.seabreezecomputers.com/tips/copy2clipboard.htm

from：https://stackoverflow.com/questions/34045777/copy-to-clipboard-using-javascript-in-ios

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