Generates the JavaScript snippet for arrow-key tooltip navigation.

Arrow key direction depends on chart orientation:

• "horizontal": ArrowLeft / ArrowRight, reads xAxis

• "vertical": ArrowDown / ArrowUp, reads yAxis

• "both": all four arrow keys, each bound to the correct axis

Usage

ro_e_keyboard_nav_axis_js(axis)

Arguments

axis

One of "horizontal", "vertical", or "both".

Value

A character string of JavaScript to be embedded in the onRender body.

See also

Other echarts4r: ro_e_build_keyboard_nav_js(), ro_e_build_onrender_js(), ro_e_detect_axis_orientation(), ro_e_keyboard_nav(), ro_e_keyboard_nav_legend_js(), ro_e_theme(), ro_e_theme_list()