以下测试代码的结果:
div[0].innerText === "aaaaa zzzzz"
div[1].innerText === "aaaaainvisiblezzzzz"
如何强制innerText
为div[1]
提供与div[0]
相同的结果?
我已尝试将div[1]
附加到临时文档中,但由于文档实际上未显示,因此无效。只将它附加到字面上可见的文档。
var div = [];
div[0] = document.getElementById("visible");
div[1] = div[0].cloneNode(true);
show(0);
show(1);
function show(i) {
document.getElementById("output").innerHTML +=
"<p>div[" + i + "].innerText === <code>" +
div[i].innerText.replace(/\n/g, "") + "</code></p>";
}
&#13;
#visible {display: block; font-family: sans-serif; font-size: larger; color: red;}
code {background-color: lightgray; padding: 0 .318em;}
&#13;
<div id="visible">
<span style="display: inline">aaaaa</span>
<span style="display: none">invisible</span>
<span style="display: inline">zzzzz</span>
</div>
<div id="output"></p>
&#13;
答案 0 :(得分:3)
仅将其附加到用户可见的文档中。
但是用户并不一定要看到这一点。 :-)如果你追加它,抓住innerText
,然后删除它,用户永远不会看到它:
var div = [];
div[0] = document.getElementById("visible");
div[1] = div[0].cloneNode(true);
show(0);
document.body.appendChild(div[1]); // *****
show(1);
document.body.removeChild(div[1]); // *****
function show(i) {
document.getElementById("output").innerHTML +=
"<p>div[" + i + "].innerText === <code>" +
div[i].innerText.replace(/\n/g, "") + "</code></p>";
}
&#13;
#visible {display: block; font-family: sans-serif; font-size: larger; color: red;}
code {background-color: lightgray; padding: 0 .318em;}
&#13;
<div id="visible">
<span style="display: inline">aaaaa</span>
<span style="display: none">invisible</span>
<span style="display: inline">zzzzz</span>
</div>
<div id="output"></p>
&#13;
或者,由于元素不在DOM中,因此CSS不能使其不可见,只能是内联样式。我无法想到除了innerText
和display: none
(visibility: hidden
之外的任何其他内联样式会导致文本被排除在opacity: 0
之外,例如,没有做到这一点,所以排除那些并规范化非pre
元素的空白是微不足道的:
function getInnerText(element) {
var node, text = "";
if (element.style.display.toLowerCase() !== "none" && element.style.visibility.toLowerCase() !== "hidden") {
for (node = element.firstChild; node; node = node.nextSibling) {
if (node.nodeType === 3) {
text += node.nodeValue;
} else if (node.nodeType === 1) {
text += getInnerText(node);
}
}
}
// Normalize all whitespace if not "pre"
if (element.tagName !== "PRE" && element.style.whiteSpace.toLowerCase().indexOf("pre") == -1) {
text = text.replace(/\s+/g, ' ');
}
return text;
}
这可能需要调整(我不认为它能正确处理<div>stuff<pre>big gap</pre></div>
),但如果你不想使用上面的第一个解决方案,你可以运行这个想法......
示例:
var div = [];
div[0] = document.getElementById("visible");
div[1] = div[0].cloneNode(true);
show(0);
document.body.appendChild(div[1]); // *****
show(1);
document.body.removeChild(div[1]); // *****
function show(i) {
document.getElementById("output").innerHTML +=
"<p>div[" + i + "].innerText === <code>" +
getInnerText(div[i]).replace(/\n/g, "") + "</code></p>";
}
function getInnerText(element) {
var node, text = "";
if (element.style.display.toLowerCase() !== "none" && element.style.visibility.toLowerCase() !== "hidden") {
for (node = element.firstChild; node; node = node.nextSibling) {
if (node.nodeType === 3) {
text += node.nodeValue;
} else if (node.nodeType === 1) {
text += getInnerText(node);
}
}
}
// Normalize all whitespace if not "pre"
if (element.tagName !== "PRE" && element.style.whiteSpace.toLowerCase().indexOf("pre") == -1) {
text = text.replace(/\s+/g, " ");
}
return text;
}
&#13;
#visible {display: block; font-family: sans-serif; font-size: larger; color: red;}
code {background-color: lightgray; padding: 0 .318em;}
&#13;
<div id="visible">
<span style="display: inline">aaaaa</span>
<span style="display: none">invisible</span>
<span style="display: inline">zzzzz</span>
</div>
<div id="output"></p>
&#13;