Boky Boky - 26 days ago 8
React JSX Question

How to get element margin in React JS

I'm trying to create an slider in React.

My component is as follows :

outterDivStyles() {
return {
position: "relative",
width: "100%",
overflow: "hidden",
height: this.props.height || 200
}
}

innerDivStyles(){
return {
position: "absolute",
top: 0,
left: this.state.left,
right: 0,
width: "1000%",
transition: "left .5s",
transitionTimingFunction: "ease"
}
}

renderArrows(){
return (
<div className="next-prev" style={{height: this.props.height || 200}}>
<div onClick={this.prevSlide.bind(this)}><img src={images.slider_arrow_left_png} /></div>
<div onClick={this.nextSlide.bind(this)}><img src={images.slider_arrow_right_png} /></div>
</div>
)
}


render(){
return(
<div>
<div ref="detailsOutterDiv" className="detailsOutterDiv" style={this.outterDivStyles()}>
<div ref="detailsInnerDiv" className="detailsInnerDiv" style={this.innerDivStyles()}>
{this.carInfo().photos.map((p, i) => {
return (
<div key={i} className="slide"><img src={p.image_url}/></div>
);
})}
</div>
{this.renderArrows()}
</div>
</div>
)
}


The css is as follows :

.slide{
margin-right: 15px;
display: inline-block;
}

.slide img{
width: 100%;
height: auto;
}


@media (min-width: 1599px) {
.detailsOutterDiv .detailsInnerDiv div{
width: (10% / 3);

}
}


Now I'm trying to get width plus margin of the div with class
slide
.

I try to do it with :

let slideWidth = this.refs["detailsInnerDiv"].childNodes[0].style.marginRight;


But
slideWidth
is 0.

Any advice?

Answer

Try this.

let node = this.refs["detailsInnerDiv"].childNodes[0] //assuming this as your target node
let nodeStyle = window.getComputedStyle(node)
let slideMarginRight = nodeStyle.getPropertyValue('margin-right')

For more info refer MDN

Hope this helps!

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