实施例，
我正在尝试检查页面特定部分是否属实，或者页面上是否有关键字。我认为最好的方法是使用js函数，但无法在脚本之外访问。这是一个例子
<script type="text/javascript">
function evaluatesomething() {
var brandUrl = document.getElementsByClassName("brand").item(1)["href"];
console.log(Url);
if (brandUrl.includes("something") == true) {
return true;
} else {
return false;
}
}
</script>
如何在另一个JS函数中调用它，如下所示：
<div class="navbar navbar-fixed-top">
<div id="navbarInner" class="navbar-inner" >
<div id="headercontainer" class="container">
<script type="text/javascript">
if (evaluatesomething() == true) {
}
</script>
答案 0 :(得分：0)
可以在加载整个脚本和html模板时完成此调用。
例如： - 当且仅当在<html>
<head>
<script data-require="d3@3.5.3" data-semver="3.5.3" src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script>
</head>
<body>
<script>
var w = 300,
h = 300,
data = [{
t: "Now",
v: 50
},{
t: "is",
v: 25
},{
t: "the",
v: 10
},{
t: "winter",
v: 30
}];
var svg = d3.select('body')
.append('svg')
.attr('width', w)
.attr('height', h);
var yScale = d3.scale.linear()
.range([0, h])
.domain([60, 0]);
var label = svg.selectAll("text")
.data(data)
.enter()
.append("text")
.text(function(d) {
return d.t;
})
.attr("transform", function(d,i){
var xText = i * (w / data.length);
var yText = h - yScale(d.v);
return "translate(" + xText + "," + yText + ") rotate(90)";
})
.attr("fill", "black")
.attr("font-family", "sans-serif")
.attr("font-size", "11px");
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<title></title>
<script src="http://d3js.org/d3.v2.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<style type="text/css">
#canvas {
width: 300px;
height: 300px;
background-color: red;
}
</style>
</head>
<body>
<div id="canvas" style="border:solid"></div>
<script type="text/javascript">
var w = 300,
h = 300;
var data = {
name: "root",
children: [{
name: '1',
size: 70
},
{
name: '2',
size: 70
},
{
name: '3',
size: 70
},
{
name: '4',
size: 70
},
{
name: '5',
size: 70
},
{
name: '6',
size: 70
},
{
name: '7',
size: 70
},
]
}
jQuery.fn.rotate = function(degrees) {
$(this).css({'-webkit-transform' : 'rotate('+ degrees +'deg)',
'-moz-transform' : 'rotate('+ degrees +'deg)',
'-ms-transform' : 'rotate('+ degrees +'deg)',
'transform' : 'rotate('+ degrees +'deg)'});
return $(this);
var r = getRandomInt(0, 180);
};
var canvas = d3.select("#canvas")
.append("svg:svg")
.attr('width', w)
.attr('height', h);
var nodes = d3.layout.pack()
.value(function(d) {
return d.size;
})
.size([w, h])
.nodes(data);
nodes.shift();
var yScale = d3.scale.linear()
.range([0, h])
.domain([60, 0]);
canvas.selectAll('circles')
.data(nodes)
.enter().append('svg:circle')
.attr('cx', function(d) {
return d.x;
})
.attr('cy', function(d) {
return d.y;
})
.attr('r', function(d) {
return d.r;
})
.attr('fill', 'white')
.attr('x', 0)
.attr('y', 0)
.attr('width', 6)
.attr('height', 6);
canvas.selectAll("text")
.data(nodes)
.enter()
.append("text")
.attr("x", function(d) {
return d.x;
})
.attr("y", function(d) {
return d.y;
})
.text(function(d) {
return "Pomidorek";
})
.attr("text-anchor", "middle")
.attr("font-family", "sans-serif")
.attr("font-size", "18px")
.attr("color", "black")
.attr("transform", function(d,i){
var xText = i * (w / children.length);
var yText = h - yScale(d.size);
return "translate(" + xText + "," + yText + ") rotate(505)";
})
</script>
</body>
</html>
时，您才能从function A()致电function B()
function A()为了简化这一点，您可以尝试jQuery的简单function B()函数，该函数仅在页面正确加载后执行代码（当然忽略图像）