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handy functions

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handy functions

Post by Admin on Fri Mar 30, 2012 10:15 am

Code:

(function(doc) {
   Document.prototype.byId = function(id) {
      return document.getElementById(id)
   };
   
   if (!'indexOf' in Array) {
      Array.prototype.indexOf = function(obj) {
         for (var i = 0, l = arr.length; i < l; i++) {
            if (arr[i] === obj) return i;
         }
         return -1;
      };
   }
   
   String.prototype.documentFragment = function() {
      if (document.createContextualFragment) {
         return document.createRange().createContextualFragment(this);
      }
      else {
         var container = document.createDocumentFragment(), div = document.createElement('div'), cur;
         div.innerHTML = this;
         while (cur = div.firstChild) {
            container.appendChild(cur);
         }
         return container;
      }
   };
   
   var ep = Element.prototype;
   
   ep.isWithin = function(parent) {
      if ('contains' in ep) {
         return parent.contains(this);
      }
      else {
         var p = this;
         while (p = p.parentNode) {
            if (p === parent) {
               return true;
            }
         }
         return false;
      }
   };
   
   ep.byTag = function(tag) {
      return this.getElementsByTagName(tag)
   };
   
   doc.byTag = ep.byTag;
   
   ep.byName = function(name) {
      var arr = document.getElementsByName(name), ret = [];
      for(var i=0,l=arr.length; i<l; i++) {
         //if this node of wanted name is within the context node.
         if(arr[i].isWithin(this)) ret.push(arr[i]);
      }
      return ret;
   };
   
   doc.byName = ep.byName;
   
   ep.byClass = function(classname,tag) {
      return 'getElementsByClassName' in doc ?
         this.getElementsByClassName(classname) :
         (function(t){
            if(!tag) tag = '*';
            var arr = t.getElementsByTagName(tag), ret = [];
            for(var i=0,l=arr.length; i<l; i++) {
               var classes = arr[i].className.split(' ');
               if(classes.indexOf(classname) != -1) {
                  ret.push(arr[i]);
               }
            }
            return ret;
         })(this);
   };
   
   doc.byClass = ep.byClass;
   
   ep.byAttr = function(attr,value) {
      var ret = [], arr=this.getElementsByTagName('*');
      for (var i=0,l=arr.length; i<l; i++) {
         var a=arr[i].getAttribute(attr), add = 0;
         //add is bool whether or not we will add this elem to ret.
         if (a) {
            if(value) {
               //if elem has attr and a value is specified.
               add = a===value ? 1 : 0;
               //if its attr equals the wanted value then make add true. Else leave it false, we don't want it.
            }
            else {
               //the elem has the attribute, and no value is wanted, so we're going to add it.
               add = 1;
            }
         }         
         if(add) ret.push(arr[i]);
      }
      return ret;
   };
   
   doc.byAttr = ep.byAttr;
   
   ep.byIndex = function(index) {
      return this.hasChildNodes() ? this.childNodes[index] : null;
   };
   
   doc.byIndex = ep.byIndex;
   
   ep.byNodeType = function(type) {
      var arr = this.childNodes, ret = [];
      for(var i=0,l=arr.length; i<l; i++) {
         if(arr[i].nodeType === type) ret.push(arr[i]);
         if(arr[i].hasChildNodes()) {
            ret = ret.concat(arr[i].byNodeType(type));
         }
      }
      return ret;
   };
   
   doc.byNodeType = ep.byNodeType;
   
   ep.byContent = function(str,tag) {
      if(!tag) tag = '*';
      var arr = this.getElementsByTagName(tag), ret = [];
      for(var i=0,l=arr.length; i<l; i++) {
         if(arr[i].innerHTML.indexOf(str) != -1) ret.push(arr[i]);
      }
      return ret;
   };
   
   doc.byContent = ep.byContent;
   
   ep.prev = function() { return this.previousSibling }
   ep.next = function() { return this.nextSibling }
   ep.last = function() { return this.lastChild }
   ep.first = function() { return this.firstChild }
   
   ep.getText = function() {
      if('text' in ep) {
         return this.text;
      }
      else if('textContent' in ep) {
         return this.textContent;
      }
      else {
         var textNodes = this.byNodeType(3), str = '';
         for(var i=0,l=textNodes.length; i<l; i++) {
            str+=textNodes[i].nodeValue;
         }
         return str;
      }
   };
   
   ep.append = function(obj) {
      if(typeof obj == 'string') {
         this.appendChild( obj.documentFragment() );
      }
      else{
         this.appendChild(obj);
      }
      return this;
   };
   
   ep.prepend = function(obj) {
      if(typeof obj == 'string') obj = obj.documentFragment();
      if(this.firstChild) {
        this.insertBefore(obj,this.firstChild);
      }
      else {
        this.appendChild(obj);
      }
      return this;
   };
   
   ep.before = function(obj) {
      if(typeof obj == 'string') obj = obj.documentFragment();
      this.parentNode.insertbefore(obj,this);
      return this;
   };
   
   ep.after = function(obj) {
      if(typeof obj == 'string') obj = obj.documentFragment();
      if(this.nextSibling) {
         this.parentNode.insertBefore(obj,this.nextSibling);
      }
      else {
         this.parentNode.appendChild(obj);
      }
      return this;
   };
   
   ep.remove = function() {
      this.parentNode.removeChild(this);
   };
   
   ep.replaceWith = function(obj) {
      this.before(obj);
      this.remove();
   }
   
})(document);

having that in a page will allow for things like this:
document.byId('p156').byClass('postprofile')[0].byContent('LGforum')[0].append(' hello');

lol... a weird example.
But its really nothing new to learn. Its just getElementsByClassName/TagName/Id etc shortened, and also now byName byAttr and byNodeType and byContent are extra ones. Smile
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Re: handy functions

Post by Admin on Fri Mar 30, 2012 10:41 am


- byId
Function only for document use. 1 param ( string id of element ).
returns: element object.

- byTag
Function. 1 param ( string id of tagname )
returns: collection of nodes.

- byName
1 param (string name )
returns collection of nodes with matching name attribute

- byClass
1 param (string className )
returns: collection of nodes with matching classname.

- byAttr
2 params. ( string Attr name [, string attr value] )
returns: collection of nodes with attribute, with matching value if specified.

- byIndex
1 param (int Index )
returns: Element object at specified index.

- byNodeType
1 param ( int nodeType )
returns: collection of nodes of matching nodetype.

- byContent
1 param ( string content )
returns: collection of nodes that contain the specified string.

- prev
0 params.
returns: elements previous sibling.

- next
0 params.
returns: elements next sibling.

- first
0 params
returns: elements first sibling.

- last
0 params.
returns: elements last sibling.

- getText
0 params.
returns: all text content of element.

- append, appends markup or object to element.
1 param. ( string/element to append )
returns the element again.

- prepend
same as append, but prepend.

- before
...

- after
..

- remove
removes the element.

- replaceWith , replaces element with new markup or element.
1 param (string/element);
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Re: handy functions

Post by Admin on Sun Apr 01, 2012 12:04 pm

- added functions hide,show and toggle.
Obvious what they do.

Code:
(function(doc) {
   //new shorthand getElementById method.
   Document.prototype.byId = function(id) {
      return document.getElementById(id)
   };
   
   //adding indexOf array method if not supported.
   if (!'indexOf' in Array) {
      Array.prototype.indexOf = function(obj) {
         for (var i = 0, l = arr.length; i < l; i++) {
            if (arr[i] === obj) return i;
         }
         return -1;
      };
   }
   
   //adding a new string method. Converts a string of markup into a document fragment.
   String.prototype.documentFragment = function() {
      if (document.createContextualFragment) {
         return document.createRange().createContextualFragment(this);
      }
      else {
         var container = document.createDocumentFragment(), div = document.createElement('div'), cur;
         div.innerHTML = this;
         while (cur = div.firstChild) {
            container.appendChild(cur);
         }
         return container;
      }
   };
   
   //functions will be added directly to Element Object Prototype.
   var ep = Element.prototype;
   
   //Internal (or External too I suppose) for determining if the node is within (a descendant of) a specified node.
   ep.isWithin = function(parent) {
      if ('contains' in ep) {
         return parent.contains(this);
      }
      else {
         var p = this;
         while (p = p.parentNode) {
            if (p === parent) {
               return true;
            }
         }
         return false;
      }
   };
   
   ep.byTag = function(tag) {
      return this.getElementsByTagName(tag)
   };
   
   doc.byTag = ep.byTag;
   
   //returns node collection by name.
   ep.byName = function(name) {
      var arr = document.getElementsByName(name), ret = [];
      for(var i=0,l=arr.length; i<l; i++) {
         //if this node of wanted name is within the context node.
         if(arr[i].isWithin(this)) ret.push(arr[i]);
      }
      return ret;
   };
   
   doc.byName = ep.byName;
   
   //returns node collection by className. Uses native if supported. Optional tag param for optmizing.
   ep.byClass = function(classname,tag) {
      return 'getElementsByClassName' in doc ?
         this.getElementsByClassName(classname) :
         (function(t){
            if(!tag) tag = '*';
            var arr = t.getElementsByTagName(tag), ret = [];
            for(var i=0,l=arr.length; i<l; i++) {
               var classes = arr[i].className.split(' ');
               if(classes.indexOf(classname) != -1) {
                  ret.push(arr[i]);
               }
            }
            return ret;
         })(this);
   };
   
   doc.byClass = ep.byClass;
   
   //get node collection by an attribute. If a value is specified only nodes with the attribute equalling the value will be returned.
   //eg byAttr('alt') - returns all elems with alt attribute. or byAttr('alt','hello') - returns all elems with alt='hello' attribute
   ep.byAttr = function(attr,value) {
      var ret = [], arr=this.getElementsByTagName('*');
      for (var i=0,l=arr.length; i<l; i++) {
         var a=arr[i].getAttribute(attr), add = 0;
         //add is bool whether or not we will add this elem to ret.
         if (a) {
            if(value) {
               //if elem has attr and a value is specified.
               add = a===value ? 1 : 0;
               //if its attr equals the wanted value then make add true. Else leave it false, we don't want it.
            }
            else {
               //the elem has the attribute, and no value is wanted, so we're going to add it.
               add = 1;
            }
         }         
         if(add) ret.push(arr[i]);
      }
      return ret;
   };
   
   doc.byAttr = ep.byAttr;
   
   ep.byIndex = function(index) {
      return this.hasChildNodes() ? this.childNodes[index] : null;
   };
   
   doc.byIndex = ep.byIndex;
   
   //returns node collection by their node type. Can collect comment blocks or text nodes etc.
   ep.byNodeType = function(type) {
      var arr = this.childNodes, ret = [];
      for(var i=0,l=arr.length; i<l; i++) {
         if(arr[i].nodeType === type) ret.push(arr[i]);
         if(arr[i].hasChildNodes()) {
            ret = ret.concat(arr[i].byNodeType(type));
         }
      }
      return ret;
   };
   
   doc.byNodeType = ep.byNodeType;
   
   //returns node collection by their content. Specify a string, and if a node contains that string it will be returned.
   //optional tag param for optimizing.
   ep.byContent = function(str,tag) {
      if(!tag) tag = '*';
      var arr = this.getElementsByTagName(tag), ret = [];
      for(var i=0,l=arr.length; i<l; i++) {
         if(arr[i].innerHTML.indexOf(str) != -1) ret.push(arr[i]);
      }
      return ret;
   };
   
   doc.byContent = ep.byContent;
   
   //returns the text content of an elem as a string. Uses native if supported.
   ep.getText = function() {
      if('text' in ep) {
         return this.text;
      }
      else if('textContent' in ep) {
         return this.textContent;
      }
      else {
         var textNodes = this.byNodeType(3), str = '';
         for(var i=0,l=textNodes.length; i<l; i++) {
            str+=textNodes[i].nodeValue;
         }
         return str;
      }
   };
   
   //finds an element/s. Will return element with matching ID if any, or className or name. null if not found.
   ep.getElem = function(elem) {
      if(elem.nodeType && elem.nodeType == 1) return elem;
      if(document.byId(elem)) return document.byId(elem);
      if(this.byClass(elem)[0]) return this.byClass(elem);
      if(this.byName(elem)[0]) return this.byName(context);
      return null;
   };
   
   doc.getElem = ep.getElem;
   
   /* Pointless...
   ep.getElems(elem) = function(elem) {
      var ret = [];
      if(document.byId(elem)) ret.push(document.byId(elem));
      if(this.byClass(elem)[0]) ret = ret.concat(this.byClass(elem));
      if(this.byName(elem)[0]) ret = ret.concat(this.byName(context));
      return ret.length > 0 ? ret : null;
   }
   */
   
   ep.append = function(obj) {
      if(typeof obj == 'string') {
         this.appendChild( obj.documentFragment() );
      }
      else{
         this.appendChild(obj);
      }
      return this;
   };
   
   ep.prepend = function(obj) {
      if(typeof obj == 'string') obj = obj.documentFragment();
      if(this.firstChild) {
        this.insertBefore(obj,this.firstChild);
      }
      else {
        this.appendChild(obj);
      }
      return this;
   };
   
   ep.before = function(obj) {
      if(typeof obj == 'string') obj = obj.documentFragment();
      this.parentNode.insertbefore(obj,this);
      return this;
   };
   
   ep.after = function(obj) {
      if(typeof obj == 'string') obj = obj.documentFragment();
      if(this.nextSibling) {
         this.parentNode.insertBefore(obj,this.nextSibling);
      }
      else {
         this.parentNode.appendChild(obj);
      }
      return this;
   };
   
   ep.remove = function() {
      this.parentNode.removeChild(this);
   };
   
   ep.replaceWith = function(obj) {
      if(typeof obj == 'string') obj = obj.documentFragment();
      this.before(obj);
      this.remove();
      return obj;
   }
   
   ep.hide = function() {
      this.style.display = 'none';
      return this;
   };
   
   ep.show = function(display) {
      this.style.display = display ? display : '';
      return this;
   };
   
   ep.toggle = function(display) {
      if (this.style.display == 'none') {
         this.show(display);
      }
      else {
         this.hide();
      }
      return this;
   };
   
   
   
   
})(document);


Minified code:
Code:

(function(g){Document.prototype.byId=function(a){return document.getElementById(a)};!1 in Array&&(Array.prototype.indexOf=function(a){for(var d=0,c=arr.length;d<c;d++)if(arr[d]===a)return d;return-1});String.prototype.documentFragment=function(){if(document.createContextualFragment)return document.createRange().createContextualFragment(this);var a=document.createDocumentFragment(),d=document.createElement("div"),c;for(d.innerHTML=this;c=d.firstChild;)a.appendChild(c);return a};var b=Element.prototype; b.isWithin=function(a){if("contains"in b)return a.contains(this);for(var d=this;d=d.parentNode;)if(d===a)return true;return false};b.byTag=function(a){return this.getElementsByTagName(a)};g.byTag=b.byTag;b.byName=function(a){for(var a=document.getElementsByName(a),d=[],c=0,b=a.length;c<b;c++)a[c].isWithin(this)&&d.push(a[c]);return d};g.byName=b.byName;b.byClass=function(a,d){var c;if("getElementsByClassName"in g)c=this.getElementsByClassName(a);else{d||(d="*");c=this.getElementsByTagName(d);for(var b= [],e=0,j=c.length;e<j;e++)c[e].className.split(" ").indexOf(a)!=-1&&b.push(c[e]);c=b}return c};g.byClass=b.byClass;b.byAttr=function(a,b){for(var c=[],f=this.getElementsByTagName("*"),e=0,g=f.length;e<g;e++){var h=f[e].getAttribute(a),i=0;h&&(i=b?h===b?1:0:1);i&&c.push(f[e])}return c};g.byAttr=b.byAttr;b.byIndex=function(a){return this.hasChildNodes()?this.childNodes[a]:null};g.byIndex=b.byIndex;b.byNodeType=function(a){for(var b=this.childNodes,c=[],f=0,e=b.length;f<e;f++){b[f].nodeType===a&&c.push(b[f]); b[f].hasChildNodes()&&(c=c.concat(b[f].byNodeType(a)))}return c};g.byNodeType=b.byNodeType;b.byContent=function(a,b){b||(b="*");for(var c=this.getElementsByTagName(b),f=[],e=0,g=c.length;e<g;e++)c[e].innerHTML.indexOf(a)!=-1&&f.push(c[e]);return f};g.byContent=b.byContent;b.getText=function(){if("text"in b)return this.text;if("textContent"in b)return this.textContent;for(var a=this.byNodeType(3),d="",c=0,f=a.length;c<f;c++)d=d+a[c].nodeValue;return d};b.getElem=function(a){return a.nodeType&&a.nodeType== 1?a:document.byId(a)?document.byId(a):this.byClass(a)[0]?this.byClass(a):this.byName(a)[0]?this.byName(context):null};g.getElem=b.getElem;b.append=function(a){typeof a=="string"?this.appendChild(a.documentFragment()):this.appendChild(a);return this};b.prepend=function(a){typeof a=="string"&&(a=a.documentFragment());this.firstChild?this.insertBefore(a,this.firstChild):this.appendChild(a);return this};b.before=function(a){typeof a=="string"&&(a=a.documentFragment());this.parentNode.insertbefore(a,this); return this};b.after=function(a){typeof a=="string"&&(a=a.documentFragment());this.nextSibling?this.parentNode.insertBefore(a,this.nextSibling):this.parentNode.appendChild(a);return this};b.remove=function(){this.parentNode.removeChild(this)};b.replaceWith=function(a){typeof a=="string"&&(a=a.documentFragment());this.before(a);this.remove();return a};b.hide=function(){this.style.display="none";return this};b.show=function(a){this.style.display=a?a:"";return this};b.toggle=function(a){this.style.display== "none"?this.show(a):this.hide();return this}})(document);
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