/*!
Autosize 3.0.17
license: MIT
http://www.jacklmoore.com/autosize
*/
(function (global, factory) {
if (typeof define === 'function' && define.amd) {
define(['exports', 'module'], factory);
} else if (typeof exports !== 'undefined' && typeof module !== 'undefined') {
factory(exports, module);
} else {
var mod = {
exports: {}
};
factory(mod.exports, mod);
global.autosize = mod.exports;
}
})(this, function (exports, module) {
'use strict';
var set = typeof Set === 'function' ? new Set() : (function () {
var list = [];
return {
has: function has(key) {
return Boolean(list.indexOf(key) > -1);
},
add: function add(key) {
list.push(key);
},
'delete': function _delete(key) {
list.splice(list.indexOf(key), 1);
}};
})();
var createEvent = function createEvent(name) {
return new Event(name);
};
try {
new Event('test');
} catch (e) {
// IE does not support `new Event()`
createEvent = function (name) {
var evt = document.createEvent('Event');
evt.initEvent(name, true, false);
return evt;
};
}
function assign(ta) {
if (!ta || !ta.nodeName || ta.nodeName !== 'TEXTAREA' || set.has(ta))
return;
var heightOffset = null;
var clientWidth = ta.clientWidth;
var cachedHeight = null;
function init() {
var style = window.getComputedStyle(ta, null);
if (style.resize === 'vertical') {
ta.style.resize = 'none';
} else if (style.resize === 'both') {
ta.style.resize = 'horizontal';
}
if (style.boxSizing === 'content-box') {
heightOffset = -(parseFloat(style.paddingTop) + parseFloat(style.paddingBottom));
} else {
heightOffset = parseFloat(style.borderTopWidth) + parseFloat(style.borderBottomWidth);
}
// Fix when a textarea is not on document body and heightOffset is Not a Number
if (isNaN(heightOffset)) {
heightOffset = 0;
}
update();
}
function changeOverflow(value) {
{
// Chrome/Safari-specific fix:
// When the textarea y-overflow is hidden, Chrome/Safari do not reflow the text to account for the space
// made available by removing the scrollbar. The following forces the necessary text reflow.
var width = ta.style.width;
ta.style.width = '0px';
// Force reflow:
/* jshint ignore:start */
ta.offsetWidth;
/* jshint ignore:end */
ta.style.width = width;
}
ta.style.overflowY = value;
resize();
}
function getParentOverflows(el) {
var arr = [];
while (el && el.parentNode && el.parentNode instanceof Element) {
if (el.parentNode.scrollTop) {
arr.push({
node: el.parentNode,
scrollTop: el.parentNode.scrollTop});
}
el = el.parentNode;
}
return arr;
}
function resize() {
var originalHeight = ta.style.height;
var overflows = getParentOverflows(ta);
var docTop = document.documentElement && document.documentElement.scrollTop; // Needed for Mobile IE (ticket #240)
ta.style.height = 'auto';
var endHeight = ta.scrollHeight + heightOffset;
if (ta.scrollHeight === 0) {
// If the scrollHeight is 0, then the element probably has display:none or is detached from the DOM.
ta.style.height = originalHeight;
return;
}
ta.style.height = endHeight + 'px';
// used to check if an update is actually necessary on window.resize
clientWidth = ta.clientWidth;
// prevents scroll-position jumping
overflows.forEach(function (el) {
el.node.scrollTop = el.scrollTop;
});
if (docTop) {
document.documentElement.scrollTop = docTop;
}
}
function update() {
resize();
var computed = window.getComputedStyle(ta, null);
var computedHeight = Math.round(parseFloat(computed.height));
var styleHeight = Math.round(parseFloat(ta.style.height));
// The computed height not matching the height set via resize indicates that
// the max-height has been exceeded, in which case the overflow should be set to visible.
if (computedHeight !== styleHeight) {
if (computed.overflowY !== 'visible') {
changeOverflow('visible');
}
} else {
// Normally keep overflow set to hidden, to avoid flash of scrollbar as the textarea expands.
if (computed.overflowY !== 'hidden') {
changeOverflow('hidden');
}
}
if (cachedHeight !== computedHeight) {
cachedHeight = computedHeight;
var evt = createEvent('autosize:resized');
ta.dispatchEvent(evt);
}
}
var pageResize = function pageResize() {
if (ta.clientWidth !== clientWidth) {
update();
}
};
var destroy = (function (style) {
window.removeEventListener('resize', pageResize, false);
ta.removeEventListener('input', update, false);
ta.removeEventListener('keyup', update, false);
ta.removeEventListener('autosize:destroy', destroy, false);
ta.removeEventListener('autosize:update', update, false);
set['delete'](ta);
Object.keys(style).forEach(function (key) {
ta.style[key] = style[key];
});
}).bind(ta, {
height: ta.style.height,
resize: ta.style.resize,
overflowY: ta.style.overflowY,
overflowX: ta.style.overflowX,
wordWrap: ta.style.wordWrap});
ta.addEventListener('autosize:destroy', destroy, false);
// IE9 does not fire onpropertychange or oninput for deletions,
// so binding to onkeyup to catch most of those events.
// There is no way that I know of to detect something like 'cut' in IE9.
if ('onpropertychange' in ta && 'oninput' in ta) {
ta.addEventListener('keyup', update, false);
}
window.addEventListener('resize', pageResize, false);
ta.addEventListener('input', update, false);
ta.addEventListener('autosize:update', update, false);
set.add(ta);
ta.style.overflowX = 'hidden';
ta.style.wordWrap = 'break-word';
init();
}
function destroy(ta) {
if (!(ta && ta.nodeName && ta.nodeName === 'TEXTAREA'))
return;
var evt = createEvent('autosize:destroy');
ta.dispatchEvent(evt);
}
function update(ta) {
if (!(ta && ta.nodeName && ta.nodeName === 'TEXTAREA'))
return;
var evt = createEvent('autosize:update');
ta.dispatchEvent(evt);
}
var autosize = null;
// Do nothing in Node.js environment and IE8 (or lower)
if (typeof window === 'undefined' || typeof window.getComputedStyle !== 'function') {
autosize = function (el) {
return el;
};
autosize.destroy = function (el) {
return el;
};
autosize.update = function (el) {
return el;
};
} else {
autosize = function (el, options) {
if (el) {
Array.prototype.forEach.call(el.length ? el : [el], function (x) {
return assign(x, options);
});
}
return el;
};
autosize.destroy = function (el) {
if (el) {
Array.prototype.forEach.call(el.length ? el : [el], destroy);
}
return el;
};
autosize.update = function (el) {
if (el) {
Array.prototype.forEach.call(el.length ? el : [el], update);
}
return el;
};
}
module.exports = autosize;
}); |