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I am trying to chartjs dashboard page.I am got some issues in bottom label color problem.I get the solution but if condtion not working to me.Please any one help me.

My Code.....

generateLabels: function(chart) {
   var get_label = _.pluck(chart.data.datasets, 'label');
   var join_label = _.flatten(get_label);
   var get_color = _.pluck(chart.data.datasets, 'backgroundColor');
   var join_color = _.flatten(get_color);
   var get_data = {
        label: join_label,
        backgroundColor: join_color
  }
  for (k = 0; k < get_data.label.length; k++) {
     return get_data.label.map(function(label, i) {
        if(label != 'undefined'){
           return {
               text: label,
               fillStyle: get_data.backgroundColor[i]
           };
        }
      });
   }

}

if(label != 'undefined') this condition not working...

Ananth
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    `label != 'undefined'` is testing if label is string with value 'undefined'. Try `value === undefined` or `!value`. – marekful Jan 30 '18 at 05:08
  • Also the `for` loop doesn't make sense. The loop variable `k` isn't used and the first statement of the loop body is a `return`. That's a quite convoluted and misleading way to express a simple `if (get_data.label.length > 0)`. Additionally I would explicitly return `undefined` or even better `null` in the cases where the function(s) don't run into a `return` if there is at least one code path ending at a `return` in a function. Otherwise it's not clear to the reader if this is on purpose or actually an error/oversight. – BlackJack Feb 01 '18 at 13:49

2 Answers2

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Replace if(label != 'undefined') for if(label). It should works

Irvin Sandoval
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  • if(label) condition is working but no any return value.I got one issues in chartjs bundle js file. Uncaught TypeError: Cannot read property 'text' of undefined at Chart.bundle.min.js:14 at Object.r.each (Chart.bundle.min.js:13) at n.fit (Chart.bundle.min.js:14) at n.update (Chart.bundle.min.js:14) at a (Chart.bundle.min.js:14) – Ananth Jan 30 '18 at 05:21
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I think your problem is that undefined is a keyword so you don't have to put it between quotes. Try with if (label != null && label != undefined) { ... }

Alvin Chipmunk
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