Cheatography
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Value TypesNumber | Any numeric value | String | Characters inside quote marks | Boolean | True or False | Null | Empty and meaningless | Object | Any value associated with the object | Function | Value returned by a function |
Operatorsx + y (numeric) | Adds x and y together | x + y (string) | Concatinates x and y together | x - y | Subtracts y from x | x * y | Multiplies x and y together | x / y | Divides x by y | x % y | Modulus: The remainder when x is divided by y | x++, ++x | Adds one to x | x--, --x | Subtracts one from x | -x | Reverses the sign on x |
Assignmentsx = y | Sets x to the value of y | x += y | Same as x = x + y | x -= y | Same as x = x - y | x *= y | Same as x = x * y | x /= y | Same as x = x / y | x %= y | Same as x = x % y |
Adding to an array.length property | Adds one value to the end of an array | push() | Adds one or more items to the end of an array | unshift() | Adds one or more items to the beginning of an array. |
MiscparseInt() | Takes a value and tries to convert it to an integer | isNaN() | Returns true if something is not a number. | setTimeout() | Specify that am action should occur on a particular schedule | Math.floor | Rounds a number down | Math.random | Generaters a random number between 0 and 1 | getElementsByTagName() | getElementById() | getElementsByClassName() | element.innerHTML | returns all the HTML between the opening and closing tags | element.nodeType | property, returns the number of the node type | element.childNodes | A node list of child nodes that are indexed numerically, and appear in source order. | element.childNodes.length | Returns the number of child nodes of the element |
| | Event Handlersonabort | The user aborted loading the page | onblur | The user left the object | onchange | The user changed the object | onclick | The user clicked an object | onerror | The script encountered an error | onfocus | The user made an object active | onload | The object finished loading | onmouseover | The cursor moved over an object | onmouseout | The cursor moved off an object | onselect | The user selected the contents of an object | onsubmit | The user submitted a form | onunload | The user left the page | onmove | The window is moved | onmousedown | A mouse button is pressed down | onmouseup | A mouse button is released | onmousemove | The mouse moves | ondblclick | A double click of a mouse button | onclick | A single click (down and then up) of a mouse button | onreset | A reset button is clicked on a form | onkeydown | Triggered when a key is pressed down | onkeyup | Triggered when a key is released | onkeypress | Triggered when a key is pressed and then released |
Comparisonsx == y | Returns true if x and y are equal | x === y | Returns true if x and y are identical | x != y | Returns true if x and y are not equal | x !== y | Returns true if x and y are not identical | x > y | Returns true if x is greater than y | x >= y | Returns true if x is greater than or equal to y | x < y | Returns true if x is less than y | x <= y | Returns true if x is less than or equal to y | x && y | Returns true if both x and y are true | x || y | Returns true if either x or y are true | !x | Returns true if x is false |
Remove item from an arraypop() | Removes the last item from the array | shift() | Removes the first item from the array |
| | jQuery - Adding and removing content to a page.html() | Retrieve or replaces the HTML inside the selection | .text() | Works like .html() but does not accept HTML tags | .append() | Adds HTML as the last child element of the selected element | .prepend() | Like .append(), but adds HTML directly after the opening tag for the selection | .before() | Add HTML outside of a selection, just before the selected element | .after() | Add HTML outside of a selection, just after the selected element | .remove() | Completely remove a selected element | .replaceWith() | Completely replace selected element |
jQuery - other.addClass | Adds a specified class to an element | .removeClass | Removes a specified class from an element | .toggleClass() | Add a class if it doesn't already exist, or remove the class if it does | .css() | Lets you directly read or change CSS properties of an element | .attr() | Reads a specified HTML attribute from a tag. Sets the specified HTML attribute if a second argument is passed. | .removeAttr() | Completely removes an attribute from a tag. | .each() | To loop through selection of elements with your own anonymous function. |
jQuery Filters:even and :odd | Selects every other element in a group | :first and :last | Selects the first or the last element in a group | :not() | to find elements that don't match a particular selctor type | :has() | finds elements that contain another selector | :contains() | Finds elements that contain specific text | :hidden | Locates elements that are hidden | :visible | Locates elements that are visible |
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you got a mistake there, length does not add a value to an array. :(
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