Introduction to JS Basics

JS Dynamic Effect

1.1Alert () Pop-up alert box

1.2Console Console output

1.3prompt input Box

1.4document.write () document print Output Documents Document Object Alert () very few user experience

Console user cannot See

1.5JS How to control styles

getElementById ("demo")

Get gets element elements by passing

Document getElementById ("Demo"). Style width = "220px"

Lycoris radiate

Mouse click OnClick

OnDblClick Mouse Double-click

onkeyup triggers when a key on the keyboard is pressed and released

onchange text content drop-down refresh

Onblur loses focus, indicating a cursor that loses the mouse, such as a text box

onmouseover mouse hover over the picture, etc.

onMouseOut mouse out of the picture area

OnSubmit Form Submission Events

OnLoad Load Event

OnUnload when you close a webpage

OnReset when resetting the form

Introduction to JS Basics