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alignContent alignItems alignSelf animation animationDelay animationDirection animationDuration animationFillMode animationIterationCount animationName animationTimingFunction animationPlayState background backgroundAttachment backgroundColor backgroundImage backgroundPosition backgroundRepeat backgroundClip backgroundOrigin backgroundSize backfaceVisibility border borderBottom borderBottomColor borderBottomLeftRadius borderBottomRightRadius borderBottomStyle borderBottomWidth borderCollapse borderColor borderImage borderImageOutset borderImageRepeat borderImageSlice borderImageSource borderImageWidth borderLeft borderLeftColor borderLeftStyle borderLeftWidth borderRadius borderRight borderRightColor borderRightStyle borderRightWidth borderSpacing borderStyle borderTop borderTopColor borderTopLeftRadius borderTopRightRadius borderTopStyle borderTopWidth borderWidth bottom boxShadow boxSizing captionSide caretColor clear clip color columnCount columnFill columnGap columnRule columnRuleColor columnRuleStyle columnRuleWidth columns columnSpan columnWidth counterIncrement counterReset cursor direction display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow flexShrink flexWrap cssFloat font fontFamily fontSize fontStyle fontVariant fontWeight fontSizeAdjust height isolation justifyContent left letterSpacing lineHeight listStyle listStyleImage listStylePosition listStyleType margin marginBottom marginLeft marginRight marginTop maxHeight maxWidth minHeight minWidth objectFit objectPosition opacity order orphans outline outlineColor outlineOffset outlineStyle outlineWidth overflow overflowX overflowY padding paddingBottom paddingLeft paddingRight paddingTop pageBreakAfter pageBreakBefore pageBreakInside perspective perspectiveOrigin position quotes resize right scrollBehavior tableLayout tabSize textAlign textAlignLast textDecoration textDecorationColor textDecorationLine textDecorationStyle textIndent textOverflow textShadow textTransform top transform transformOrigin transformStyle transition transitionProperty transitionDuration transitionTimingFunction transitionDelay unicodeBidi userSelect verticalAlign visibility width wordBreak wordSpacing wordWrap widows zIndex

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HTML DOM insertBefore() Metode

Element Voorwerp

Voorbeeld

Voeg 'n nuwe <li>-element voor die eerste onderliggende element van 'n <ul>-element in:

var newItem = document.createElement("LI");       // Create a <li> node
var textnode = document.createTextNode("Water");  // Create a text node
newItem.appendChild(textnode);                    // Append the text to <li>

var list = document.getElementById("myList");    // Get the <ul> element to insert a new node
list.insertBefore(newItem, list.childNodes[0]);  // Insert <li> before the first child of <ul>

Meer "Probeer dit self" voorbeelde hieronder.


Definisie en gebruik

Die insertBefore()-metode voeg 'n nodus as 'n kind in, reg voor 'n bestaande kind, wat jy spesifiseer.

Wenk: As jy 'n nuwe lysitem met teks wil skep, onthou om die teks as 'n Teksnodus te skep wat jy by die <li>-element voeg, en voeg dan <li> by die lys in.

Jy kan ook die insertBefore-metode gebruik om 'n bestaande element in te voeg/skuif (Sien "Meer voorbeelde").


Blaaierondersteuning

Die nommers in die tabel spesifiseer die eerste blaaierweergawe wat die metode ten volle ondersteun.

Method
insertBefore() Yes Yes Yes Yes Yes

Sintaksis

node.insertBefore(newnode, existingnode)

Parameterwaardes

Parameter Type Description
newnode Node object Required. The node object you want to insert
existingnode Node object Required. The child node you want to insert the new node before. If set to null, the insertBefore method will insert the newnode at the end


Tegniese besonderhede

Terugkeerwaarde: 'n Node-objek, wat die ingevoegde nodus verteenwoordig
DOM weergawe Kernvlak 1 Node-objek

Meer voorbeelde

Voorbeeld

Skuif 'n <li>-element van een lys na 'n ander:

var node = document.getElementById("myList2").lastChild;
var list = document.getElementById("myList1");
list.insertBefore(node, list.childNodes[0]);

Element Voorwerp