dart - Insert Input Tag into td tags via templates -

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I have a table and each row has an edit button. If that button is pressed then all TD tags should have a text input tag, which includes the price. So for every TD two templates will be very much. & lt; tr template ... & gt; will not work because TD tags will be ignored by the browser, because see the table around the TDS template. Have done a lot with the template and it did not work. 

  & lt; Table & gt; & Lt; TR & gt; & Lt; TD & gt; td11 & lt; / Td> & Lt; TD & gt; td12 & lt; / Td> & Lt; TD & gt; & Lt; Click on the button = "{{someFunc}}" /> & Lt; / TD & gt; & Lt; / TR & gt; & Lt; TR & gt; & Lt; TD & gt; td21 & lt; / Td> & Lt; TD & gt; td22 & lt; / Td> & Lt; TD & gt; & Lt; Click on the button = "{{someFunc}}" /> & Lt; / TD & gt; & Lt ;! - This button will be pressed - & gt; & Lt; / TR & gt; & Lt; / Table & gt;   
 After pressing the button, the table should look like this:  
  & lt; Table & gt; & Lt; TR & gt; & Lt; TD & gt; td11 & lt; / Td> & Lt; TD & gt; td12 & lt; / Td> & Lt; TD & gt; & Lt; Click on the button = "{{someFunc}}" /> & Lt; / TD & gt; & Lt; / TR & gt; & Lt; TR & gt; & Lt; TD & gt; & Lt; Input type = "text" value = "td21" /> & Lt; / TD & gt; & Lt; TD & gt; & Lt; Input type = "text" value = "td22" /> & Lt; / TD & gt; & Lt; TD & gt; & Lt; Click on the button = "{{someFunc}}" /> & Lt; / TD & gt; & Lt ;! - This button will be pressed - & gt; & Lt; / TR & gt; & Lt; / Table & gt;   
 Since there are huge applause, the template in each TD is not an option. I currently have an alternate solution where the extended TD tag is used with polymer.   
 
 
 You can try it  
  & lt; Table & gt; & Lt; TR & gt; & Lt; TD & gt; & Lt; Template if = "{{info ['line1'] ['active'] == incorrect}}" & gt; TD11 & lt; / Template & gt; & Lt; Template if = "{{info {'row1'] ['active'] == true}}" & gt; Input   
 With some backing code containing  
  map info = toObservable ({'row1': {'active': false}}); SomeFunc (event E) {if (info [e.target.id] ['active'] == wrong) {info [e.target.id] ['active'] = true; } And {info [e.target.id] ['active'] = false; }}   
 You can do this by using other types of backing data structures, and the information I create can be somewhat simpler than the map, but I think it It's like something you do.

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