我已经确定textarea
的高度根据其内容(而不是滚动)而改变。但默认的高度是32px而不是16px,我该如何改变它。动态文本区域高度
HTML:
<textarea id="cryTextArea" style="background:#fff; border:dashed #bc2122 1px; height:auto; width:100%;"></textarea>
的Javascript/jQuery的:
var observe;
if (window.attachEvent) {
observe = function(element, event, handler) {
element.attachEvent('on' + event, handler);
};
} else {
observe = function(element, event, handler) {
element.addEventListener(event, handler, false);
};
}
var firstHeight = 0;
var storeH = 0;
var storeH2 = 0;
function init() {
var text = document.getElementById('cryTextArea');
function resize() {
//console.log(text.scrollHeight);
text.style.height = 'auto';
if (storeH != text.scrollHeight) {
text.style.height = text.scrollHeight + 'px';
storeH = text.scrollHeight;
if (storeH2 != storeH) {
console.log("SENT->" + storeH);
storeH2 = storeH;
}
}
}
/* 0-timeout to get the already changed text */
function delayedResize() {
window.setTimeout(resize, 0);
}
observe(text, 'change', resize);
observe(text, 'cut', delayedResize);
observe(text, 'paste', delayedResize);
observe(text, 'drop', delayedResize);
observe(text, 'keydown', delayedResize);
text.focus();
text.select();
resize();
}
init();
您可以使用[textarea的自动调整大小](http://javierjulio.github.io/textarea-autosize/)或[flexibleArea(http://flaviusmatis.github.io/flexibleArea.js /)或[jQuery .elastic()](http://stackoverflow.com/questions/17772260/textarea-auto-height) – MKAD