.dataset converts String to Float

fnllc · July 24, 2019, 12:14am

I have a strange problem with the .dataset functionality. It converts a string into float when assigned to a variable:

var cw_id = $$(this).dataset().cwId;

The following screenshot explains the issue. The cwId value is correctly a string in the dataset, but when assigned to a var it becomes a float.

I’m using FF7 4.4.7

shastox · July 24, 2019, 8:20am

github.com

nolimits4web/dom7/blob/28b0db30d77fa765ccae9497a2f0e3dfbc2cf55f/src/methods.js#L151


      const attr = el.attributes[i];
      if (attr.name.indexOf('data-') >= 0) {
        dataset[toCamelCase(attr.name.split('data-')[1])] = attr.value;
      }
    }
  }
  // eslint-disable-next-line
  for (const key in dataset) {
    if (dataset[key] === 'false') dataset[key] = false;
    else if (dataset[key] === 'true') dataset[key] = true;
    else if (parseFloat(dataset[key]) === dataset[key] * 1) dataset[key] *= 1;
  }
  return dataset;
}
function val(value) {
  const dom = this;
  if (typeof value === 'undefined') {
    if (dom[0]) {
      if (dom[0].multiple && dom[0].nodeName.toLowerCase() === 'select') {
        const values = [];
        for (let i = 0; i < dom[0].selectedOptions.length; i += 1) {

fnllc · July 24, 2019, 9:24am

The problem for me is that cwId should stay a string, because the .0 that goes missing is critical.

nolimits4web · July 24, 2019, 9:26am

Just use native dataset as:

var cw_id = $$(this)[0].dataset.cwId;