[英]error: Uncaught TypeError: Illegal constructor JavaScript
const cases = document.querySelector('coronovirus-input');
const deaths = document.querySelector('deaths-input');
const recovered =document.querySelector('recovered-input');
const ctx = document.getElementById('mychart').getContext("2d");
let mychart = new CharacterData(ctx , {
type:'pie',
data: {
labels : ['Active Cases','Deaths','Recovered'],
datasets : [
{
label:'# of votes',
data : [0,0,0],
backgroundColor:['#2adece','#dd3b79','#ff766b'],
borderWidth:1
}
]
}
});
const updateChartValue = (input, dataOrder) => {
input.addEventListener ('change', e => {
mychart.data.datasets[0].data[DataOrder] = e.target.value;
mychart.update();
});
};
updateChartValue(cases,0);
updateChartValue(deaths,1);
updateChartValue(recovered,2);
Hi Guys I cant solve this problem... i want to make pie chart but I cant I am newbie to share any post in this website sorry if I did any mistakes This Error嗨,伙计们,我无法解决这个问题...我想制作饼图,但我是新手,无法在本网站上分享任何帖子,如果我犯了任何错误,对不起这个错误
I see several issues in the code you posted, but most notably the constructor for initialising new mychart()
should be Chart
rather than new CharacterData()
(possible typo due to auto-completion in your editor?).我在您发布的代码中看到了几个问题,但最值得注意的是初始化
new mychart()
的构造函数应该是Chart
而不是new CharacterData()
(由于您的编辑器中的自动完成可能会出现拼写错误?)。
The other one is in the updateChartValue
that shows a mismatch in the case of the dataOrder
argument and where it is used.另一个在
updateChartValue
中,它在dataOrder
参数的情况下和使用它的位置显示不匹配。
See solution here https://codepen.io/beezital/pen/zYEmKRG在此处查看解决方案https://codepen.io/beezital/pen/zYEmKRG
const cases = document.getElementById('coronovirus-input');
const deaths = document.getElementById('deaths-input');
const recovered =document.getElementById('recovered-input');
const ctx = document.getElementById('mychart').getContext("2d");
let mychart = new Chart(ctx , {
type:'pie',
data: {
labels : ['Active Cases','Deaths','Recovered'],
datasets : [
{
label:'# of votes',
data : [10,20,30],
backgroundColor:['#2adece','#dd3b79','#ff766b'],
borderWidth:1
}
]
}
});
const updateChartValue = (input, dataOrder) => {
input.addEventListener ('change', e => {
mychart.data.datasets[0].data[dataOrder] = e.target.value;
mychart.update();
});
};
updateChartValue(cases,0);
updateChartValue(deaths,1);
updateChartValue(recovered,2);
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