Summary of DOM

establish

document.write

innerHTML

createElement

increase

appendChild

inserBefore

Delete

removeChild

modify

The main thing is to modify dom Element properties of
1 Modify element properties src , href , title wait
2 Modify the content of common elements innerHTML interText
3 Modify form elements value type disabled wait
4 Modify element styles style className wait

lookup

Mainly used to query dom The elements of
1 DOM Provided API Method ： getElementByid, getElementdByTagName（ Ancient usage Not recommended ）
2 H5 New methods provided ： querySelector,querySelectorAll
3 Use node operations to get elements Father （prantNode）, Son （children）, brother （previousElementSibling（ the previous ）,
nextElementSibling） promote

Attribute operation

It is mainly aimed at custom attributes
1 setAttribute Set up dom The attribute value
2 getAttribute obtain dom The attribute value
3 removeAttribute Remove properties

Event operations

1 Get the event source first
2 Registration events
3 Add event handler