Basic Weather app: I'm trying to change what is displayed to the user based on what city they select on a...

Currenctly I have the following dropdown:

<select id="dropdown">

   <option value="manchester" id="manchester" >Manchester</option>

   <option value="leeds" id="leeds">Leeds</option>

   <option value="london" id="london">London</option>

 </select>

I want the the selection of this dropdown to display the weather for that area. I currently have the following JS.

  navigator.geolocation.getCurrentPosition(checked);



  var manchester = document.getElementById("manchester").value;

  var leeds = document.getElementById("leeds").value;

  var london = document.getElementById("london").value;



function checked() {

    if (document.getElementById('dropdown').value == manchester) {

      var lat = 53.48;

      var long = -2.24;

      weather(lat, long);

    } else if (document.getElementById('dropdown').value == leeds) {

      var lat = 53.80;

      var long = -1.5491;

      weather(lat, long);

    } else if (document.getElementById('dropdown').value == london) {

      var lat = 51.5074;

      var long = -0.12;

      weather(lat, long);     

   }

  }

This works, only if I manually change the html of each option to selected="selected". But I really want it to work upon the user selecting the option. It seems when you choose an option, it isn't automatically recognized as selected?

Would really appreciate some help with this and if possible, an explanation of how your code works.

asked Nov 11 at 13:22

Alexander Ross Thompson

154

add a comment |

Currenctly I have the following dropdown:

<select id="dropdown">

   <option value="manchester" id="manchester" >Manchester</option>

   <option value="leeds" id="leeds">Leeds</option>

   <option value="london" id="london">London</option>

 </select>

I want the the selection of this dropdown to display the weather for that area. I currently have the following JS.

  navigator.geolocation.getCurrentPosition(checked);



  var manchester = document.getElementById("manchester").value;

  var leeds = document.getElementById("leeds").value;

  var london = document.getElementById("london").value;



function checked() {

    if (document.getElementById('dropdown').value == manchester) {

      var lat = 53.48;

      var long = -2.24;

      weather(lat, long);

    } else if (document.getElementById('dropdown').value == leeds) {

      var lat = 53.80;

      var long = -1.5491;

      weather(lat, long);

    } else if (document.getElementById('dropdown').value == london) {

      var lat = 51.5074;

      var long = -0.12;

      weather(lat, long);     

   }

  }

Would really appreciate some help with this and if possible, an explanation of how your code works.

asked Nov 11 at 13:22

Alexander Ross Thompson

154

add a comment |

Currenctly I have the following dropdown:

<select id="dropdown">

   <option value="manchester" id="manchester" >Manchester</option>

   <option value="leeds" id="leeds">Leeds</option>

   <option value="london" id="london">London</option>

 </select>

I want the the selection of this dropdown to display the weather for that area. I currently have the following JS.

  navigator.geolocation.getCurrentPosition(checked);



  var manchester = document.getElementById("manchester").value;

  var leeds = document.getElementById("leeds").value;

  var london = document.getElementById("london").value;



function checked() {

    if (document.getElementById('dropdown').value == manchester) {

      var lat = 53.48;

      var long = -2.24;

      weather(lat, long);

    } else if (document.getElementById('dropdown').value == leeds) {

      var lat = 53.80;

      var long = -1.5491;

      weather(lat, long);

    } else if (document.getElementById('dropdown').value == london) {

      var lat = 51.5074;

      var long = -0.12;

      weather(lat, long);     

   }

  }

Would really appreciate some help with this and if possible, an explanation of how your code works.

asked Nov 11 at 13:22

Alexander Ross Thompson

154

Currenctly I have the following dropdown:

<select id="dropdown">

   <option value="manchester" id="manchester" >Manchester</option>

   <option value="leeds" id="leeds">Leeds</option>

   <option value="london" id="london">London</option>

 </select>

I want the the selection of this dropdown to display the weather for that area. I currently have the following JS.

  navigator.geolocation.getCurrentPosition(checked);



  var manchester = document.getElementById("manchester").value;

  var leeds = document.getElementById("leeds").value;

  var london = document.getElementById("london").value;



function checked() {

    if (document.getElementById('dropdown').value == manchester) {

      var lat = 53.48;

      var long = -2.24;

      weather(lat, long);

    } else if (document.getElementById('dropdown').value == leeds) {

      var lat = 53.80;

      var long = -1.5491;

      weather(lat, long);

    } else if (document.getElementById('dropdown').value == london) {

      var lat = 51.5074;

      var long = -0.12;

      weather(lat, long);     

   }

  }

Would really appreciate some help with this and if possible, an explanation of how your code works.

javascript

asked Nov 11 at 13:22

Alexander Ross Thompson

154

asked Nov 11 at 13:22

Alexander Ross Thompson

154

asked Nov 11 at 13:22

Alexander Ross Thompson

154

asked Nov 11 at 13:22

Alexander Ross Thompson

154

asked Nov 11 at 13:22

Alexander Ross Thompson

154

add a comment |

2 Answers
2

active

oldest

votes

so you could say :

document.getElementById("dropdown").addEventListener("change",checked)



function checked(e) {

let  elm = e.srcElement //this just returns the element which has been changed (the dropdown) 

if (elm.value == "manchester") {

  var lat = 53.48;

  var long = -2.24;

  weather(lat, long);

} else if (elm.value == "leeds") {

  var lat = 53.80;

  var long = -1.5491;

  weather(lat, long);

} else if (elm.value == "london") {

  var lat = 51.5074;

  var long = -0.12;

  weather(lat, long);

}
}

edited Nov 11 at 13:56

answered Nov 11 at 13:48

Ditrix 36

162

add a comment |

you could add an event listener to get the value of the select tag with the onchange event and use that value to call the funtion that displays the weather

answered Nov 11 at 13:41

Ditrix 36

162

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

so you could say :

document.getElementById("dropdown").addEventListener("change",checked)



function checked(e) {

let  elm = e.srcElement //this just returns the element which has been changed (the dropdown) 

if (elm.value == "manchester") {

  var lat = 53.48;

  var long = -2.24;

  weather(lat, long);

} else if (elm.value == "leeds") {

  var lat = 53.80;

  var long = -1.5491;

  weather(lat, long);

} else if (elm.value == "london") {

  var lat = 51.5074;

  var long = -0.12;

  weather(lat, long);

}
}

edited Nov 11 at 13:56

answered Nov 11 at 13:48

Ditrix 36

162

add a comment |

so you could say :

document.getElementById("dropdown").addEventListener("change",checked)



function checked(e) {

let  elm = e.srcElement //this just returns the element which has been changed (the dropdown) 

if (elm.value == "manchester") {

  var lat = 53.48;

  var long = -2.24;

  weather(lat, long);

} else if (elm.value == "leeds") {

  var lat = 53.80;

  var long = -1.5491;

  weather(lat, long);

} else if (elm.value == "london") {

  var lat = 51.5074;

  var long = -0.12;

  weather(lat, long);

}
}

edited Nov 11 at 13:56

answered Nov 11 at 13:48

Ditrix 36

162

add a comment |

so you could say :

document.getElementById("dropdown").addEventListener("change",checked)



function checked(e) {

let  elm = e.srcElement //this just returns the element which has been changed (the dropdown) 

if (elm.value == "manchester") {

  var lat = 53.48;

  var long = -2.24;

  weather(lat, long);

} else if (elm.value == "leeds") {

  var lat = 53.80;

  var long = -1.5491;

  weather(lat, long);

} else if (elm.value == "london") {

  var lat = 51.5074;

  var long = -0.12;

  weather(lat, long);

}
}

edited Nov 11 at 13:56

answered Nov 11 at 13:48

Ditrix 36

162

so you could say :

document.getElementById("dropdown").addEventListener("change",checked)



function checked(e) {

let  elm = e.srcElement //this just returns the element which has been changed (the dropdown) 

if (elm.value == "manchester") {

  var lat = 53.48;

  var long = -2.24;

  weather(lat, long);

} else if (elm.value == "leeds") {

  var lat = 53.80;

  var long = -1.5491;

  weather(lat, long);

} else if (elm.value == "london") {

  var lat = 51.5074;

  var long = -0.12;

  weather(lat, long);

}
}

edited Nov 11 at 13:56

answered Nov 11 at 13:48

Ditrix 36

162

edited Nov 11 at 13:56

answered Nov 11 at 13:48

Ditrix 36

162

answered Nov 11 at 13:48

Ditrix 36

162

answered Nov 11 at 13:48

Ditrix 36

162

add a comment |

you could add an event listener to get the value of the select tag with the onchange event and use that value to call the funtion that displays the weather

answered Nov 11 at 13:41

Ditrix 36

162

add a comment |

you could add an event listener to get the value of the select tag with the onchange event and use that value to call the funtion that displays the weather

answered Nov 11 at 13:41

Ditrix 36

162

add a comment |

you could add an event listener to get the value of the select tag with the onchange event and use that value to call the funtion that displays the weather

answered Nov 11 at 13:41

Ditrix 36

162

you could add an event listener to get the value of the select tag with the onchange event and use that value to call the funtion that displays the weather

answered Nov 11 at 13:41

Ditrix 36

162

answered Nov 11 at 13:41

Ditrix 36

162

answered Nov 11 at 13:41

Ditrix 36

162

answered Nov 11 at 13:41

Ditrix 36

162

add a comment |

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