openlayers - After setting the VectorLayer style, some features cannot be displayed

Question

with all features,only show the first two features

var fs = cntrLayer.getSource().getFeatures();
    for (var i = 0; i < fs.length; i++) {
        f = fs[i];
        f.setStyle(that.contourStyle(f))
    }

picture with all features

not including the last features,show all features without the last one

var fs = cntrLayer.getSource().getFeatures();
    for (var i = 0; i < fs.length-1; i++) {
        f = fs[i];
        f.setStyle(that.contourStyle(f))
    }

picture without the last one feature

question from:https://stackoverflow.com/questions/65878417/after-setting-the-vectorlayer-style-some-features-cannot-be-displayed

Answer 1

Waitting for answers