Category: JavaScript Answers

Sometimes, we want to get hash parameters from request URL with JavaScript.

In this article, we’ll look at how to get hash parameters from request URL with JavaScript.

How to get hash parameters from request URL with JavaScript?

To get hash parameters from request URL with JavaScript, we can use the URL instance’s hash property.

For instance, we write:

const hash = new URL("http://www.example.com/abc#xyz").hash;
console.log(hash)

to create a new URL instance from a URL string.

Then we get the hash value of the URL from the hash property.

Therefore, hash is '#xyz'.

Conclusion

To get hash parameters from request URL with JavaScript, we can use the URL instance’s hash property.

Sometimes, we want to detect browser TLS compatibility with JavaScript

In this article, we’ll look at how to detect browser TLS compatibility with JavaScript.

How to detect browser TLS compatibility with JavaScript?

To detect browser TLS compatibility with JavaScript, we can use How’s my SSL.

For instance, we write:

(async () => {
  const res = await fetch(`https://api.allorigins.win/get?url=${encodeURIComponent('http://www.howsmyssl.com/a/check')}`)
  const {
    contents
  } = await res.json()
  const data = JSON.parse(contents)
  const [versionName, versionNum] = data.tls_version.split(' ');
  if (versionName !== 'TLS' || versionNum < 1.2) {
    console.log('not secure')
  } else {
    console.log('secure')
  }
  console.log(data);
})()

We make a GET request to http://www.howsmyssl.com/a/check with fetch.

It doesn’t support CORS, so we’ve to use a CORS proxy to make a request to it.

Next, we get the versionName and versionNum from the data.

If versionName is 'TLS' and versioNum is 1.2 or bigger, then our browser is secure.

Conclusion

To detect browser TLS compatibility with JavaScript, we can use How’s my SSL.

Sometimes, we want to change X and Y axis font color with Chart.js 3 and JavaScript.

In this article, we’ll look at how to change X and Y axis font color with Chart.js 3 and JavaScript.

How to change X and Y axis font color with Chart.js 3 and JavaScript?

To change X and Y axis font color with Chart.js 3 and JavaScript, we can set the options.scales property.

For instance, we write:

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>

<canvas id="myChart" width="400" height="400"></canvas>

to add the Chart.js script and canvas.

Then we write:

const ctx = document.getElementById('myChart');

const myChart = new Chart(ctx, {
  type: 'line',
  data: {
    labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
    datasets: [{
      label: '# of Votes',
      data: [12, 19, 3, 5, 2, 3],
      fill: true,
      borderWidth: 1,
    }]
  },
  options: {
    scales: {
      x: {
        ticks: {
          color: 'green'
        }
      },
      y: {
        ticks: {
          color: 'red'
        }
      }
    }
  }
});

We select the canvas with document.getElementById.

Then we set the options.scales.x.ticks.color and options.scales.y.ticks.color properties to set the color of the x and y axis labels respectively.

As a result, we should see the the x-axis labels are green and y-axis labels are red.

Conclusion

To change X and Y axis font color with Chart.js 3 and JavaScript, we can set the options.scales property.