Javascript Course

- The history object is part of the window object, and contains the URLs visited by the user (within a browser window).
It contains useful methods and properties that let you move back and forth through the user's history, and manipulate the contents of the history stack.
- Syntax:

window.history.property_name
window.history.methodName()

• The history object has two properties: length and state.
window.history.length - returns the number of URLs in the history list.
window.history.state - returns the object added in history with pushState() or replaceState().


Methods of the history object

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which type of <input> creates input fields that should contain a numeric value?
type="text" type="number" type="date"
<input type="number" name="points" min="5" max="80" />
Which CSS property allows to change the transparency of an element?
font-style opacity color
#id {
  filter:alpha(opacity=40);    /* for IE */
  opacity:0.4;
}
Click on the function that formats a number to specified number of characters.
toPrecision() exp() toFixed()
var num = 12.34567;
alert( num.toPrecision(3) );       // 12.3
Which function randomizes the order of the elements into an array?
natsort() shuffle() sort()
$lang =[10=>"PHP", 20=>"JavaScript", "site"=>"coursesweb.net");
shuffle($lang);
var_export($lang);     // array (0=>"coursesweb.net", 1=>"PHP", 2=>"JavaScript")
The history object

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