This example shows how to add gridlines to a `Chart`.
{{>charts-gridlines-source}}
Adding gridlines to a `Chart` instance
Gridlines can be used to make a chart more readable. You can add gridlines to a chart with the `horizontalGridlines` and `verticalGridlines` attributes. There are 2 ways to
add gridlines to a chart. Setting either attribute to `true` will add gridlines with default styling. Alternatively, you can pass a style object to either attribute. The `styles`
object of a gridline contains the line property with color, alpha and weight attributes.
CSS
```
#mychart {
margin:10px 10px 10px 10px;
width:90%;
max-width: 800px;
height:400px;
}
```
HTML
```
```
JavaScript
```
YUI().use('charts', function (Y)
{
var myDataValues = [
{category:"5/1/2010", miscellaneous:2000, expenses:3700, revenue:2200},
{category:"5/2/2010", miscellaneous:50, expenses:9100, revenue:100},
{category:"5/3/2010", miscellaneous:400, expenses:1100, revenue:1500},
{category:"5/4/2010", miscellaneous:200, expenses:1900, revenue:2800},
{category:"5/5/2010", miscellaneous:5000, expenses:5000, revenue:2650}
];
var mychart = new Y.Chart({
dataProvider:myDataValues,
render:"#mychart",
horizontalGridlines: {
styles: {
line: {
color: "#dad8c9"
}
}
},
verticalGridlines: {
styles: {
line: {
color: "#dad8c9"
}
}
}
});
});
```