如何改变一个对象是另一个对象

Question

我将值传递给函数addPolyline（道具）内的值的值更改路径值和色彩动态

var lineSymbol = { 
    path: 'M 0,-1 0,1', 
    strokeOpacity: 1, 
    scale: 4,   
    strokeWeight: 2, 
}; 



function addPolyline(props){  
    flightPath = new google.maps.Polyline({ 
     path: props.flightPath, 
     geodesic: true, 
     strokeColor: props.color, 
     strokeOpacity: 0, 
     icons: [{ 
      icon: lineSymbol, 
      offset: '0', 
      repeat: '20px' 
     }] 
    }); 
} 

addPolyline({ 
    flightPath: flightPlanCoordinates, 
    color: "#f9a61e" 
}); 

但是我怎么更改不透明度它在lineSymbol中，但在addPolyline中作为图标键的一部分调用。

Answer 1

你只需要使用您的props来初始化lineSymbol值来传递所需值

function addPolyline(props){ 
    lineSymbol.strokeOpacity = props.symbolOpacity; 
    flightPath = new google.maps.Polyline({ 
    ... 

，或者，如果你不希望修改全局lineSymbol

function addPolyline(props){ 
    var symbol = Object.assign({}, lineSymbol) 
    symbol.strokeOpacity = props.symbolOpacity; 
    flightPath = new google.maps.Polyline({ 
    ... 
    icons: [{ 
     icon: symbol, 

，并调用与

addPolyline({ 
    flightPath: flightPlanCoordinates, 
    color: "#f9a61e", 
    symbolOpacity: 0.8 
});