I want to convert the format example '00: 30: 00' on seconds. This is my way. Is there a way to add these values in the 'template string'?

expected effect:

convert1000('00:30:00') --> 1800

convert1000('00:00:10') --> 10

convert1000('00:08:10') --> 490

convert1000('01:01:10') --> 3670

const convert1000 = (time) => {
    const [hour, minute, sec] = time.split(':');

    if (hour !== "00") {
      return `${(hour* 3600)} + ${(minute * 60)} + ${(sec)}`;
    }

    if (minute !== "00") {
      return `${minute * 60} + ${sec} `;
    }

    return `${sec} `;
  }

I want to convert the format example '00: 30: 00' on seconds. This is my way. Is there a way to add these values in the 'template string'?

expected effect:

convert1000('00:30:00') --> 1800

convert1000('00:00:10') --> 10

convert1000('00:08:10') --> 490

convert1000('01:01:10') --> 3670

const convert1000 = (time) => {
    const [hour, minute, sec] = time.split(':');

    if (hour !== "00") {
      return `${(hour* 3600)} + ${(minute * 60)} + ${(sec)}`;
    }

    if (minute !== "00") {
      return `${minute * 60} + ${sec} `;
    }

    return `${sec} `;
  }

• javascript
• momentjs

• 2 Why do you want a template string here? Seems rather odd. – epascarello Commented Jun 26, 2019 at 12:58
• Possible duplicate of Convert HH:MM:SS string to seconds only in javascript – Feras Al Sous Commented Jun 26, 2019 at 12:58
• Use only one ${} but still seems odd. – epascarello Commented Jun 26, 2019 at 12:59
• Like this maybe? jsfiddle/khrismuc/rbzhtep9 – user5734311 Commented Jun 26, 2019 at 12:59
• You want a sscanf from good old C? Alas, I don't believe vanilla JS has it. – mbojko Commented Jun 26, 2019 at 13:01

6 Answers 6

Use asSeconds from momentjs duration objects

moment.duration('00:30:00').asSeconds();

You could split and reduce the values by multiplying the former value by 60 and then add the value.

const convert1000 = time => time.split(':').reduce((s, t) => s * 60 + +t, 0);
  
console.log(convert1000('00:30:00')); // 1800
console.log(convert1000('00:00:10')); // 10
console.log(convert1000('00:08:10')); // 58 is wrong, because 8 minutes is 480 plus 10 sec
console.log(convert1000('01:01:10')); // 3670

You need to do it like this

const convert1000 = (time) => {
  const [h,m,s] = time.split(':');
  let seconds = (h*3600) + (m * 60) + parseInt(s);
  return seconds;
}

alert(convert1000("00: 30: 00"))

See the fiddle here https://jsfiddle/q4zvsowe/

You need to convert the string numbers into integers first. This should work the way you intend:

let convert1000 = (timeString) => {
    let [hour, minute, second] = timeString.split(':').map(Number);
    return `${(hour* 3600) + (minute * 60) + (second)}`;
}

Note that this returns a string; if you want it to be a number, just remove the templating.

You need to put the + inside the braces to make them sum numbers.

You should put it inside one ${}

So your code would be like below:

const convert2000 = (time) => {
    const [hour, minute, sec] = time.split(':');

    if (hour !== "00") {
      return `${hour* 3600 + minute * 60 + sec}`;
    }

    if (minute !== "00") {
      return `${minute * 60 + sec} `;
    }

    return `${sec}`;
}

Try this:

const convert1000 = (time) => {
  const [hour, minute, sec] = time.split(':');
  return hour * 3600 + minute * 60 + sec * 1;
};

console.log(convert1000('00:30:00'));