jQuery - how can I find the element with a certain id

Question

I have a table and each of its td has a unique id that corresponds to some time intervals  0800 til 0830    0830 til 0900 and so on     I have an input text where the user will type the time intervals they want to block    If they type an interval that doesn t exist in my table  in other words  if they type an interval that doesn t correspond to any of my td s id s  I want to show an alert saying something like this interval is not available for blocking   But  I m having difficulty to find this id   I m doing this       var horaInicial       horaInicial   val   split      0        horaInicial   val   split      1      this is remover the     from a formatted hour      var verificaHorario       tbIntervalos   find  td   attr  id   horaInicial     But this verificaHorario is actually setting all my td s to this horaInicial id   How can I find the id in my table and if it doesn t exist show some alert

User · Answer

This  var verificaHorario       tbIntervalos   find       horaInicial     will find you the td that needs to be blocked   Actually this will also do   var verificaHorario           horaInicial     Testing for the size   of the wrapped set will answer your question regarding the existence of the id

User · Answer

As all html ids are unique in a valid html document why not search for the ID directly  If you re concerned if they type in an id that isn t a table then you can inspect the tag type that way   Just an idea   S

User · Answer

If you re trying to find an element by id  you don t need to search the table only - it should be unique on the page  and so you should be able to use   var verificaHorario           horaInicial     If you need to search only in the table for whatever reason  you can use   var verificaHorario       tbIntervalos   find  td     horaInicial

User · Answer

This is one more option to find the element for above question      tbIntervalos   find  td id    horaInicial

User · Answer

I don t know if this solves your problem but instead of       tbIntervalos   find  td   attr  id   horaInicial     you can just do       tbIntervalos td     horaInicial

[jquery] jQuery - how can I find the element with a certain id?

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