(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = global || self, global.autosize = factory());
}(this, (function () {
var map = typeof Map === "function" ? new Map() : function () {
var keys = [];
var values = [];
return {
has: function has(key) {
return keys.indexOf(key) > -1;
},
get: function get(key) {
return values[keys.indexOf(key)];
},
set: function set(key, value) {
if (keys.indexOf(key) === -1) {
keys.push(key);
values.push(value);
}
},
"delete": function _delete(key) {
var index = keys.indexOf(key);
if (index > -1) {
keys.splice(index, 1);
values.splice(index, 1);
}
}
};
}();
var createEvent = function createEvent(name) {
return new Event(name, {
bubbles: true
});
};
try {
new Event('test');
} catch (e) {
// IE does not support `new Event()`
createEvent = function createEvent(name) {
var evt = document.createEvent('Event');
evt.initEvent(name, true, false);
return evt;
};
}
function assign(ta) {
if (!ta || !ta.nodeName || ta.nodeName !== 'TEXTAREA' || map.has(ta)) return;
var heightOffset = null;
var clientWidth = null;
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:end */
ta.style.width = width;
}
ta.style.overflowY = value;
}
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() {
if (ta.scrollHeight === 0) {
// If the scrollHeight is 0, then the element probably has display:none or is detached from the DOM.
return;
}
var overflows = getParentOverflows(ta);
var docTop = document.documentElement && document.documentElement.scrollTop; // Needed for Mobile IE (ticket #240)
ta.style.height = '';
ta.style.height = ta.scrollHeight + heightOffset + '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 styleHeight = Math.round(parseFloat(ta.style.height));
var computed = window.getComputedStyle(ta, null); // Using offsetHeight as a replacement for computed.height in IE, because IE does not account use of border-box
var actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(computed.height)) : ta.offsetHeight; // The actual height not matching the style height (set via the resize method) indicates that
// the max-height has been exceeded, in which case the overflow should be allowed.
if (actualHeight < styleHeight) {
if (computed.overflowY === 'hidden') {
changeOverflow('scroll');
resize();
actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(window.getComputedStyle(ta, null).height)) : ta.offsetHeight;
}
} else {
// Normally keep overflow set to hidden, to avoid flash of scrollbar as the textarea expands.
if (computed.overflowY !== 'hidden') {
changeOverflow('hidden');
resize();
actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(window.getComputedStyle(ta, null).height)) : ta.offsetHeight;
}
}
if (cachedHeight !== actualHeight) {
cachedHeight = actualHeight;
var evt = createEvent('autosize:resized');
try {
ta.dispatchEvent(evt);
} catch (err) {// Firefox will throw an error on dispatchEvent for a detached element
//
https://bugzilla.mozilla.org/show_bug.cgi?id=889376
}
}
}
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);
Object.keys(style).forEach(function (key) {
ta.style[key] = style[key];
});
map["delete"](ta);
}.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);
ta.style.overflowX = 'hidden';
ta.style.wordWrap = 'break-word';
map.set(ta, {
destroy: destroy,
update: update
});
init();
}
function destroy(ta) {
var methods = map.get(ta);
if (methods) {
methods.destroy();
}
}
function update(ta) {
var methods = map.get(ta);
if (methods) {
methods.update();
}
}
var autosize = null; // Do nothing in Node.js environment and IE8 (or lower)
if (typeof window === 'undefined' || typeof window.getComputedStyle !== 'function') {
autosize = function autosize(el) {
return el;
};
autosize.destroy = function (el) {
return el;
};
autosize.update = function (el) {
return el;
};
} else {
autosize = function autosize(el, options) {
if (el) {
Array.prototype.forEach.call(el.length ? el : [el], function (x) {
return assign(x);
});
}
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;
};
}
var autosize$1 = autosize;
return autosize$1;
})));
