HMTL Code:
<div >
<div >
<div >
<h6 >Evolution of Names vs Dates</h6>
<div >
</div>
</div>
<div >
<div >
<canvas id="food_items_line_chart"></canvas>
</div>
</div>
</div>
</div>
Javascript Code:
<script>
$(document).ready(function () {
var ctx = $("#my_line_chart");
var names2 = ['name1', 'name2'];
var colors2 = ['orange', 'blue'];
var data2 = [[10,20],[20,30]];
var dates2 = ['2020-01', '2020-02'];
var data =
{
labels: dates2,
datasets :
[
for (let i = 0; i <= data.length; i )
{
{
label: names2[i],
data: data2[i],
borderColor:
[
colors2[i],
],
borderWidth : 1
},
}
]
};
var options = {
title : {
display : false,
position : "top",
fontSize : 18,
fontColor : "#111"
},
legend : {
display : true
},
scales : {
yAxes : [{
ticks : {
min : 0
}
}]
}
};
var chart = new Chart( ctx, {
type : "line",
data : data,
options : options
});
});
</script>
I am just starting to learn javascript so I'm probably doing alot of things wrong, but the idea is to load this ChartJs Line chart on a HTML page. I am getting alot of errors while inspecting the HTML page, the first error is: "Uncaught SyntaxError: Unexpected token 'for'".
CodePudding user response:
You can use Array.map()
to directly transform your data into the definition required by Chart.js.
Please take a look at your amended and runnable code and see how it works.
var names2 = ['name1', 'name2'];
var colors2 = ['orange', 'blue'];
var data2 = [[10, 20], [20, 30]];
var dates2 = ['2020-01', '2020-02'];
new Chart('food_items_line_chart', {
type: 'line',
data: {
labels: dates2,
datasets: dates2.map((ds, i) => ({
label: names2[i],
data: data2[i],
borderColor: colors2[i],
borderWidth: 1
}))
},
options: {
scales: {
y: {
min: 0
}
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.1/chart.min.js"></script>
<canvas id="food_items_line_chart" height="80"></canvas>