clampValue.indexOf('em') > -1),
truncationHTMLContainer;
if (opt.truncationHTML) {
truncationHTMLContainer = document.createElement('span');
truncationHTMLContainer.innerHTML = opt.truncationHTML;
}
// UTILITY FUNCTIONS __________________________________________________________
/**
* Return the current style for an element.
* @param {HTMLElement} elem The element to compute.
* @param {string} prop The style property.
* @returns {number}
*/
function computeStyle(elem, prop) {
if (!win.getComputedStyle) {
win.getComputedStyle = function(el, pseudo) {
this.el = el;
this.getPropertyValue = function(prop) {
var re = /(\-([a-z]){1})/g;
if (prop == 'float') prop = 'styleFloat';
if (re.test(prop)) {
prop = prop.replace(re, function() {
return arguments[2].toUpperCase();
});
}
return el.currentStyle && el.currentStyle[prop] ? el.currentStyle[prop] : null;
};
return this;
};
}
return win.getComputedStyle(elem, null).getPropertyValue(prop);
}
/**
* Returns the maximum number of lines of text that should be rendered based
* on the current height of the element and the line-height of the text.
*/
function getMaxLines(height) {
var availHeight = height
关键词：通过封装一个v-clamp的指令处理多行文本的溢出