# Code coverage report for cheerio/lib/api/css.js

## Statements: 100% (40 / 40) Branches: 93.33% (28 / 30) Functions: 100% (9 / 9) Lines: 100% (38 / 38) Ignored: none

All files » cheerio/lib/api/ » css.js

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     var _ = require('lodash'),
        domEach = require('../utils').domEach;
    var toString = Object.prototype.toString;

    /**
     * Set / Get css.
     *
     * @param {String|Object} prop
     * @param {String} val
     * @return {self}
     * @api public
     */

    exports.css = function(prop, val) {
      if (arguments.length === 2 ||
        // When `prop` is a "plain" object
        (toString.call(prop) === '[object Object]')) {
        return domEach(this, function(idx, el) {
          setCss(el, prop, val, idx);
        });
      } else {
        return getCss(this[0], prop);
      }
    };

    /**
     * Set styles of all elements.
     *
     * @param {String|Object} prop
     * @param {String} val
     * @param {Number} idx - optional index within the selection
     * @return {self}
     * @api private
     */

    function setCss(el, prop, val, idx) {
      if ('string' == typeof prop) {
        var styles = getCss(el);
        if (typeof val === 'function') {
          val = val.call(el, idx, el);
        }

        if (val === '') {
          delete styles[prop];
        } else if (val != null) {
          styles[prop] = val;
        }

        el.attribs.style = stringify(styles);
      } else Eif ('object' == typeof prop) {
        Object.keys(prop).forEach(function(k){
          setCss(el, k, prop[k]);
        });
      }
    }

    /**
     * Get parsed styles of the first element.
     *
     * @param {String} prop
     * @return {Object}
     * @api private
     */

    function getCss(el, prop) {
      var styles = parse(el.attribs.style);
      if (typeof prop === 'string') {
        return styles[prop];
      } else if (Array.isArray(prop)) {
        return _.pick(styles, prop);
      } else {
        return styles;
      }
    }

    /**
     * Stringify `obj` to styles.
     *
     * @param {Object} obj
     * @return {Object}
     * @api private
     */

    function stringify(obj) {
      return Object.keys(obj || {})
        .reduce(function(str, prop){
          return str += ''
            + (str ? ' ' : '')
            + prop
            + ': '
            + obj[prop]
            + ';';
        }, '');
    }

    /**
     * Parse `styles`.
     *
     * @param {String} styles
     * @return {Object}
     * @api private
     */

    function parse(styles) {
      styles = (styles || '').trim();

      if (!styles) return {};

      return styles
        .split(';')
        .reduce(function(obj, str){
          var n = str.indexOf(':');
          // skip if there is no :, or if it is the first/last character
          if (n < 1 || n === str.length-1) return obj;
          obj[str.slice(0,n).trim()] = str.slice(n+1).trim();
          return obj;
        }, {});
    }